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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: 2004/04/07 13:34:55 $
00007   Version:   $Revision: 1.13 $
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       this->operator[](i) = other[i];
00077     m_ElementCount = other.m_ElementCount;
00078   }
00080 
00082   const Self& operator=(const Self& other)
00083   {
00084     this->set_size(other.m_ElementCount);
00085     for (unsigned int i = 0; i < other.m_ElementCount; ++i)
00086       this->operator[](i) = other[i];
00087     m_ElementCount = other.m_ElementCount;
00088     return *this;
00089   }
00091 
00093   bool operator==(const Self& other) const
00094   {
00095     return (m_Data == other.m_Data);
00096   }
00097 
00099   bool operator!=(const Self& other) const
00100   {
00101     return (m_Data != other.m_Data);
00102   }
00103 
00105   iterator begin()
00106     { return m_Data; }
00107   const_iterator begin() const
00108     { return m_Data; }
00109   iterator end()
00110     { return (m_Data + m_ElementCount); }
00111   const_iterator end() const
00112     { return (m_Data + m_ElementCount); }
00113   unsigned int size() const
00114     { return m_ElementCount; }
00116 
00118   const TPixel & operator[](unsigned int i) const
00119     { return m_Data[i]; }
00120   TPixel &operator[](unsigned int i)
00121     { return m_Data[i]; }
00123 
00125   void set_size(unsigned int n)
00126     {
00127     if (m_Data) { Deallocate(); }
00128     this->Allocate(n);
00129     }
00131 
00132 protected:
00133   unsigned int m_ElementCount;
00134   TPixel *m_Data;
00135 };
00136 
00137 template<class TPixel>
00138 inline std::ostream& operator<<(std::ostream &o, const NeighborhoodAllocator<TPixel>
00139                                 & a)
00140 {
00141     o << "NeighborhoodAllocator { this = " << &a << ", begin = "
00142       << static_cast<const void *>(a.begin())
00143       << ", size=" << a.size()
00144       << " }";
00145       //      << ", contents:{ ";
00146       //    for (int i = 0; i < a.size(); ++i) o << a[i] << " ";
00147     o << " } }";
00148   return o;
00149 }
00150   
00151 
00152 
00153 } // end namespace itk
00154 #endif
00155 

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