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itkConstSliceIterator.h

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00001 /*========================================================================= 00002 00003 Program: Insight Segmentation & Registration Toolkit 00004 Module: $RCSfile: itkConstSliceIterator.h,v $ 00005 Language: C++ 00006 Date: $Date: 2003/09/10 14:29:05 $ 00007 Version: $Revision: 1.5 $ 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 __itkConstSliceIterator_h 00018 #define __itkConstSliceIterator_h 00019 00020 #include "itkMacro.h" 00021 #include "itkExceptionObject.h" 00022 #include <valarray> 00023 namespace itk { 00024 00047 template<class TPixel, class TContainer> 00048 class ITK_EXPORT ConstSliceIterator 00049 { 00050 public: 00052 ConstSliceIterator(const TContainer *n, std::slice s) 00053 : m_ContainerPointer(n), m_Pos(0), m_Slice(s) {} 00054 00056 ConstSliceIterator Begin() 00057 { 00058 ConstSliceIterator ans = *this; 00059 ans.m_Pos = 0; 00060 return ans; 00061 } 00062 00064 ConstSliceIterator End() 00065 { 00066 ConstSliceIterator ans = *this; 00067 ans.m_Pos = m_Slice.size(); 00068 return ans; 00069 } 00070 00072 ConstSliceIterator operator++() 00073 { 00074 m_Pos++; 00075 return *this; 00076 } 00077 00079 ConstSliceIterator operator++(int) 00080 { 00081 ConstSliceIterator ans = *this; 00082 m_Pos++; 00083 return ans; 00084 } 00085 00088 const TPixel& operator[](unsigned long n) 00089 { 00090 return this->Loc(m_Pos=n); 00091 } 00092 00095 const TPixel& operator*() 00096 { 00097 return Loc(m_Pos); 00098 } 00099 00102 bool operator==(const ConstSliceIterator &orig) 00103 { 00104 return orig.m_Pos==this->m_Pos 00105 && orig.m_Slice.stride()==this->m_Slice.stride() 00106 && orig.m_Slice.start() ==this->m_Slice.start(); 00107 } 00108 00110 bool operator!=(const ConstSliceIterator &orig) 00111 { 00112 return ! operator==(orig); 00113 } 00114 00118 bool operator<(const ConstSliceIterator &orig) 00119 { 00120 return this->m_Pos < orig.m_Pos 00121 && this->m_Slice.stride()==orig.m_Slice.stride() 00122 && this->m_Slice.start()==orig.m_Slice.start(); 00123 } 00124 00125 private: 00127 const TPixel& Loc(unsigned long n) const 00128 { 00129 return (*m_ContainerPointer)[m_Slice.start() 00130 + n * m_Slice.stride()]; 00131 } 00132 00134 const TContainer *m_ContainerPointer; 00135 00137 unsigned long m_Pos; 00138 00140 std::slice m_Slice; 00141 }; 00142 00143 } // end namespace itk 00144 00145 #endif

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