mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-07-06 07:17:25 +00:00
214 lines
7.0 KiB
C++
214 lines
7.0 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#ifndef vtk_m_BinaryOperators_h
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#define vtk_m_BinaryOperators_h
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#include <vtkm/Math.h>
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#include <vtkm/internal/ExportMacros.h>
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namespace vtkm
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{
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// Disable conversion warnings for Sum and Product on GCC only.
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// GCC creates false positive warnings for signed/unsigned char* operations.
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// This occurs because the values are implicitly casted up to int's for the
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// operation, and than casted back down to char's when return.
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// This causes a false positive warning, even when the values is within
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// the value types range
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#if (defined(VTKM_GCC) || defined(VTKM_CLANG))
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wconversion"
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#endif // gcc || clang
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/// Binary Predicate that takes two arguments argument \c x, and \c y and
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/// returns sum (addition) of the two values.
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/// @note Requires a suitable definition of `operator+(T, U)`.
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struct Sum
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{
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template <typename T, typename U>
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VTKM_EXEC_CONT auto operator()(const T& x, const U& y) const -> decltype(x + y)
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{
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return x + y;
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}
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// If both types are the same integral type, explicitly cast the result to
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// type T to avoid narrowing conversion warnings from operations that promote
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// to int (e.g. `int operator+(char, char)`)
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template <typename T>
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VTKM_EXEC_CONT
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typename std::enable_if<std::is_integral<T>::value && sizeof(T) < sizeof(int), T>::type
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operator()(const T& x, const T& y) const
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{
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return static_cast<T>(x + y);
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}
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};
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/// Binary Predicate that takes two arguments argument \c x, and \c y and
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/// returns product (multiplication) of the two values.
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/// @note Requires a suitable definition of `operator*(T, U)`.
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struct Product
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{
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template <typename T, typename U>
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VTKM_EXEC_CONT auto operator()(const T& x, const U& y) const -> decltype(x * y)
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{
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return x * y;
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}
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// If both types are the same integral type, explicitly cast the result to
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// type T to avoid narrowing conversion warnings from operations that promote
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// to int (e.g. `int operator+(char, char)`)
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template <typename T>
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VTKM_EXEC_CONT
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typename std::enable_if<std::is_integral<T>::value && sizeof(T) < sizeof(int), T>::type
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operator()(const T& x, const T& y) const
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{
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return static_cast<T>(x * y);
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}
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};
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#if (defined(VTKM_GCC) || defined(VTKM_CLANG))
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#pragma GCC diagnostic pop
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#endif // gcc || clang
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/// Binary Predicate that takes two arguments argument \c x, and \c y and
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/// returns the \c x if x > y otherwise returns \c y.
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/// @note Requires a suitable definition of `bool operator<(T, U)` and that
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/// `T` and `U` share a common type.
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//needs to be full length to not clash with vtkm::math function Max.
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struct Maximum
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{
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template <typename T, typename U>
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VTKM_EXEC_CONT typename std::common_type<T, U>::type operator()(const T& x, const U& y) const
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{
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return x < y ? y : x;
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}
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};
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/// Binary Predicate that takes two arguments argument \c x, and \c y and
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/// returns the \c x if x < y otherwise returns \c y.
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/// @note Requires a suitable definition of `bool operator<(T, U)` and that
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/// `T` and `U` share a common type.
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//needs to be full length to not clash with vtkm::math function Min.
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struct Minimum
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{
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template <typename T, typename U>
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VTKM_EXEC_CONT typename std::common_type<T, U>::type operator()(const T& x, const U& y) const
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{
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return x < y ? x : y;
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}
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};
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/// Binary Predicate that takes two arguments argument \c x, and \c y and
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/// returns a vtkm::Vec<T,2> that represents the minimum and maximum values.
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/// Note: Requires Type \p T implement the vtkm::Min and vtkm::Max functions.
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template <typename T>
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struct MinAndMax
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{
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VTKM_EXEC_CONT
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vtkm::Vec<T, 2> operator()(const T& a) const { return vtkm::make_Vec(a, a); }
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VTKM_EXEC_CONT
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vtkm::Vec<T, 2> operator()(const T& a, const T& b) const
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{
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return vtkm::make_Vec(vtkm::Min(a, b), vtkm::Max(a, b));
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}
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VTKM_EXEC_CONT
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vtkm::Vec<T, 2> operator()(const vtkm::Vec<T, 2>& a, const vtkm::Vec<T, 2>& b) const
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{
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return vtkm::make_Vec(vtkm::Min(a[0], b[0]), vtkm::Max(a[1], b[1]));
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}
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VTKM_EXEC_CONT
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vtkm::Vec<T, 2> operator()(const T& a, const vtkm::Vec<T, 2>& b) const
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{
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return vtkm::make_Vec(vtkm::Min(a, b[0]), vtkm::Max(a, b[1]));
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}
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VTKM_EXEC_CONT
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vtkm::Vec<T, 2> operator()(const vtkm::Vec<T, 2>& a, const T& b) const
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{
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return vtkm::make_Vec(vtkm::Min(a[0], b), vtkm::Max(a[1], b));
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}
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};
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/// Binary Predicate that takes two arguments argument \c x, and \c y and
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/// returns the bitwise operation <tt>x&y</tt>
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/// @note Requires a suitable definition of `operator&(T, U)`.
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struct BitwiseAnd
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{
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template <typename T, typename U>
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VTKM_EXEC_CONT auto operator()(const T& x, const U& y) const -> decltype(x & y)
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{
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return x & y;
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}
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// If both types are the same integral type, explicitly cast the result to
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// type T to avoid narrowing conversion warnings from operations that promote
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// to int (e.g. `int operator+(char, char)`)
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template <typename T>
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VTKM_EXEC_CONT
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typename std::enable_if<std::is_integral<T>::value && sizeof(T) < sizeof(int), T>::type
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operator()(const T& x, const T& y) const
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{
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return static_cast<T>(x & y);
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}
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};
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/// Binary Predicate that takes two arguments argument \c x, and \c y and
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/// returns the bitwise operation <tt>x|y</tt>
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/// @note Requires a suitable definition of `operator&(T, U)`.
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struct BitwiseOr
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{
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template <typename T, typename U>
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VTKM_EXEC_CONT auto operator()(const T& x, const U& y) const -> decltype(x | y)
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{
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return x | y;
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}
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// If both types are the same integral type, explicitly cast the result to
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// type T to avoid narrowing conversion warnings from operations that promote
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// to int (e.g. `int operator+(char, char)`)
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template <typename T>
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VTKM_EXEC_CONT
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typename std::enable_if<std::is_integral<T>::value && sizeof(T) < sizeof(int), T>::type
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operator()(const T& x, const T& y) const
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{
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return static_cast<T>(x | y);
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}
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};
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/// Binary Predicate that takes two arguments argument \c x, and \c y and
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/// returns the bitwise operation <tt>x^y</tt>
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/// @note Requires a suitable definition of `operator&(T, U)`.
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struct BitwiseXor
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{
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template <typename T, typename U>
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VTKM_EXEC_CONT auto operator()(const T& x, const U& y) const -> decltype(x ^ y)
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{
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return x ^ y;
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}
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// If both types are the same integral type, explicitly cast the result to
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// type T to avoid narrowing conversion warnings from operations that promote
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// to int (e.g. `int operator+(char, char)`)
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template <typename T>
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VTKM_EXEC_CONT
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typename std::enable_if<std::is_integral<T>::value && sizeof(T) < sizeof(int), T>::type
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operator()(const T& x, const T& y) const
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{
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return static_cast<T>(x ^ y);
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}
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};
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} // namespace vtkm
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#endif //vtk_m_BinaryOperators_h
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