/usr/include/ITK-4.5/itkNeighborhoodAllocator.h is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o644.
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*
* 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 __itkNeighborhoodAllocator_h
#define __itkNeighborhoodAllocator_h
#include <iostream>
namespace itk
{
/** \class NeighborhoodAllocator
* \brief A memory allocator for use as the default allocator type in
* Neighborhood.
*
* This is a memory allocator for use as the default allocator type in
* Neighborhood. The API is designed to mimic that of vnl_vector so that
* vnl_vector can also be used as an allocator for Neighborhood.
*
* The decision to create this allocator with the vnl_vector api (versus
* using an STL allocator and wrapping the vnl_vector API) was made because
* the STL allocator API is not guaranteed stable at this time.
*
* \ingroup Operators
* \ingroup ITKCommon
*/
template< typename TPixel >
class NeighborhoodAllocator
{
public:
/** Standard class typedefs. */
typedef NeighborhoodAllocator Self;
/** Iterator support. Note that the naming of the typedefs is on purpose.
* itk::Neighborhood makes reference to the allocator, which because it may
* be vnl or other type, uses the lower case/underscore forms iterator and
* const_iterator. */
typedef TPixel * iterator;
typedef const TPixel * const_iterator;
/** Default constructor */
NeighborhoodAllocator():m_ElementCount(0), m_Data(0) {}
/** Default destructor */
~NeighborhoodAllocator()
{ this->Deallocate(); }
/** Allocates memory using new() */
void Allocate(unsigned int n)
{
m_Data = new TPixel[n];
m_ElementCount = n;
}
/** Deallocates memory using delete[](). */
void Deallocate()
{
delete[] m_Data;
m_ElementCount = 0;
}
/** Copy constructor. */
NeighborhoodAllocator(const Self & other):m_ElementCount(0), m_Data(0)
{
this->set_size(other.m_ElementCount);
for ( unsigned int i = 0; i < other.m_ElementCount; ++i )
{
this->operator[](i) = other[i];
}
m_ElementCount = other.m_ElementCount;
}
/** Assignment operator. */
const Self & operator=(const Self & other)
{
if(this != &other)
{
this->set_size(other.m_ElementCount);
for ( unsigned int i = 0; i < other.m_ElementCount; ++i )
{
this->operator[](i) = other[i];
}
m_ElementCount = other.m_ElementCount;
}
return *this;
}
/** Comparison operator. */
bool operator==(const Self & other) const
{
return ( m_Data == other.m_Data );
}
/** Not Equal operator. */
bool operator!=(const Self & other) const
{
return ( m_Data != other.m_Data );
}
/** STL-style iterator support for the memory buffer. */
iterator begin()
{ return m_Data; }
const_iterator begin() const
{ return m_Data; }
iterator end()
{ return ( m_Data + m_ElementCount ); }
const_iterator end() const
{ return ( m_Data + m_ElementCount ); }
unsigned int size() const
{ return m_ElementCount; }
/** Data access methods */
const TPixel & operator[](unsigned int i) const
{ return m_Data[i]; }
TPixel & operator[](unsigned int i)
{ return m_Data[i]; }
/** Allocates or Reallocates a buffer of size n */
void set_size(unsigned int n)
{
if ( m_Data ) { Deallocate(); }
this->Allocate(n);
}
protected:
unsigned int m_ElementCount;
TPixel * m_Data;
};
template< typename TPixel >
inline std::ostream & operator<<(
std::ostream & o, const NeighborhoodAllocator< TPixel >
& a)
{
o << "NeighborhoodAllocator { this = " << &a << ", begin = "
<< static_cast< const void * >( a.begin() )
<< ", size=" << a.size()
<< " }";
return o;
}
} // end namespace itk
#endif
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