/usr/include/ITK-4.9/itkFEMP.h is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | /*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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.txt
*
* 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 itkFEMP_h
#define itkFEMP_h
#include <iostream>
#include "itkMacro.h"
namespace itk
{
namespace fem
{
/**
* \class FEMP
* \brief Pointer used to store polymorphic elements in STL arrays.
*
* FEMP holds a pointer to objects of typename T and its derived classes. it
* behaves like a special kind of pointer. Special pointers to object can
* be used to store polymorphic arrays in STL. The basic idea of the special
* pointer is: whatever you do to the pointer (object of class FEMP), is
* also reflected on the object within (pointed to by m_Data member). For
* example: if you copy the special pointer, an object within is also copied.
*
* Class T should have a member Clone() which produces a copy of an object.
* This is important in polymorphic classes, where object of the derived
* class should be created when copying an existing object.
*
* Class T should also include typedefs T::Pointer and T::ConstPointer that
* define standard pointers to the class. Note that these could be
* SmartPointer classes.
* \ingroup ITKFEM
*/
template <typename T>
class FEMP
{
public:
/**
* Default constructor makes sure that m_Data is 0,
* to prevent problems when deleting m_Data object
* on destruction.
*/
FEMP() : m_Data(0)
{
}
/**
* Copy constructor. Clone() method is called
* to duplicate the existing object.
*/
FEMP(const FEMP & x)
{
if( x.m_Data )
{
#ifdef USE_FEM_CLONE
m_Data = static_cast<T *>( x.m_Data->Clone().GetPointer() );
#else
std::cout << "Create Another" << std::endl;
m_Data = static_cast<T *>( x.m_Data->CreateAnother().GetPointer() );
#endif
}
else
{
m_Data = ITK_NULLPTR;
}
}
/**
* Conversion constructor from T::Pointer to FEMP<T>.
* The object T* must exist and we take ownership of object T*.
* If you want to create a copy of object and take ownership of that,
* use: FEMP(x->Clone()) instead of FEMP(x).
*/
explicit FEMP(typename T::Pointer x) : m_Data(x)
{
}
/**
* Destructor of a special pointer class also destroys the actual object.
*/
~FEMP()
{
m_Data = ITK_NULLPTR;
}
/**
* Asignment operator
*/
const FEMP<T> & operator=(const FEMP<T> & rhs);
/**
* Easy access to members of stored object
*/
typename T::Pointer operator->() const
{
return m_Data;
}
/**
* Dereferencing operator provides automatic conversion from
* special to standard pointer to object
*/
operator T *() const
{
return m_Data;
}
/**
* Return true if special pointer actually points
* to a valid object and false otherwise.
*/
bool IsNULL() const
{
return m_Data == 0;
}
private:
/**
* Pointer to actual object. Note that this could be a SmartPointer.
*/
typename T::Pointer m_Data;
};
template <typename T>
const FEMP<T> & FEMP<T>::operator=(const FEMP<T> & rhs)
{
/** Self assignments don't make sense. */
if( &rhs != this )
{
/**
* First destroy the existing object on the left hand side
*/
m_Data = ITK_NULLPTR;
/**
* Then clone the one on the right hand side
* of the expression (if not ITK_NULLPTR).
*/
if( rhs.m_Data )
{
#ifdef USE_FEM_CLONE
m_Data = static_cast<T *>( rhs.m_Data->Clone().GetPointer() );
#else
m_Data = static_cast<T *>( rhs.m_Data->CreateAnother().GetPointer() );
#endif
}
else
{
m_Data = ITK_NULLPTR;
}
}
return *this;
}
}
} // end namespace itk::fem
#endif // #ifndef itkFEMP_h
|