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itkNeighborhoodAllocator.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkNeighborhoodAllocator.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-03-03 15:07:52 $
00007   Version:   $Revision: 1.16 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkNeighborhoodAllocator_h
00018 #define __itkNeighborhoodAllocator_h
00019 #include <iostream>
00020 
00021 namespace itk {
00034 template <class TPixel>
00035 class NeighborhoodAllocator
00036 {
00037 public:
00039   typedef NeighborhoodAllocator Self;
00040 
00045   typedef TPixel *       iterator;
00046   typedef const TPixel * const_iterator;
00047 
00049   NeighborhoodAllocator() : m_ElementCount(0), m_Data(0)  {}
00050 
00052   ~NeighborhoodAllocator()
00053     { this->Deallocate(); }
00054 
00056   void Allocate(unsigned int n)
00057     {
00058     m_Data = new TPixel[n];
00059     m_ElementCount = n;
00060     }
00062 
00064   void Deallocate()
00065     {
00066     if (m_Data) delete[] m_Data;
00067     m_ElementCount = 0;
00068     }
00070 
00072   NeighborhoodAllocator(const Self& other) : m_ElementCount(0), m_Data(0)
00073     {
00074     this->set_size(other.m_ElementCount);
00075     for (unsigned int i = 0; i < other.m_ElementCount; ++i)
00076       {
00077       this->operator[](i) = other[i];
00078       }
00079     m_ElementCount = other.m_ElementCount;
00080     } 
00082 
00084   const Self& operator=(const Self& other)
00085     {
00086     this->set_size(other.m_ElementCount);
00087     for (unsigned int i = 0; i < other.m_ElementCount; ++i)
00088       {
00089       this->operator[](i) = other[i];
00090       }
00091     m_ElementCount = other.m_ElementCount;
00092     return *this;
00093     }
00095 
00097   bool operator==(const Self& other) const
00098     {
00099     return (m_Data == other.m_Data);
00100     }
00101 
00103   bool operator!=(const Self& other) const
00104     {
00105     return (m_Data != other.m_Data);
00106     }
00107 
00109   iterator begin()
00110     { return m_Data; }
00111   const_iterator begin() const
00112     { return m_Data; }
00113   iterator end()
00114     { return (m_Data + m_ElementCount); }
00115   const_iterator end() const
00116     { return (m_Data + m_ElementCount); }
00117   unsigned int size() const
00118     { return m_ElementCount; }
00120 
00122   const TPixel & operator[](unsigned int i) const
00123     { return m_Data[i]; }
00124   TPixel &operator[](unsigned int i)
00125     { return m_Data[i]; }
00127 
00129   void set_size(unsigned int n)
00130     {
00131     if (m_Data) { Deallocate(); }
00132     this->Allocate(n);
00133     }
00135 
00136 protected:
00137   unsigned int m_ElementCount;
00138   TPixel      *m_Data;
00139 };
00140 
00141 template<class TPixel>
00142 inline std::ostream& operator<<(
00143   std::ostream &o, const NeighborhoodAllocator<TPixel>
00144   & a)
00145 {
00146   o << "NeighborhoodAllocator { this = " << &a << ", begin = "
00147     << static_cast<const void *>(a.begin())
00148     << ", size=" << a.size()
00149     << " }";
00150   return o;
00151 }
00152 
00153 } // end namespace itk
00154 #endif
00155 

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