/* Templated iterators for the image storage class (which uses lazymanager) Mark Jenkinson, FMRIB Image Analysis Group Copyright (C) 2000 University of Oxford */ /* Part of FSL - FMRIB's Software Library http://www.fmrib.ox.ac.uk/fsl fsl@fmrib.ox.ac.uk Developed at FMRIB (Oxford Centre for Functional Magnetic Resonance Imaging of the Brain), Department of Clinical Neurology, Oxford University, Oxford, UK LICENCE FMRIB Software Library, Release 5.0 (c) 2012, The University of Oxford (the "Software") The Software remains the property of the University of Oxford ("the University"). 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Contact details are: innovation@isis.ox.ac.uk quoting reference DE/9564. */ #if !defined(__positerators_h) #define __positerators_h #include #include "lazy.h" #include using namespace LAZY; namespace NEWIMAGE { //---------------------------------------------------------------------// // Mutable, Forward Iterator template class poslazyiterator { private: T* iter; lazymanager* lazyptr; int x; int y; int z; int lx0; int ly0; int lz0; int lx1; int ly1; int lz1; int RowAdjust; int SliceAdjust; void calc_offsets(int rowoff, int sliceoff) { RowAdjust = rowoff + (lx0 - lx1); SliceAdjust = sliceoff + rowoff*(ly0 - ly1) + (lx0 - lx1); } public: poslazyiterator() : lazyptr(0) { } poslazyiterator(const poslazyiterator& source) { this->operator=(source); } poslazyiterator(T* sourceptr, lazymanager* lazyp, int xinit, int yinit, int zinit, int x0, int y0, int z0, int x1, int y1, int z1, int rowoff, int sliceoff) : iter(sourceptr), lazyptr(lazyp), x(xinit), y(yinit), z(zinit), lx0(x0), ly0(y0), lz0(z0), lx1(x1), ly1(y1), lz1(z1) { calc_offsets(rowoff,sliceoff); } ~poslazyiterator() { } // do nothing inline const poslazyiterator operator++(int) { poslazyiterator tmp=*this; ++(*this); return tmp; } inline const poslazyiterator& operator++() // prefix { x++; if (x>lx1) { x=lx0; y++; if (y>ly1) { y=ly0; z++; if (z>lz1) { ++iter; } // end condition else { iter+=SliceAdjust; } } else { iter+=RowAdjust; } } else { ++iter;} return *this; } inline bool operator==(const poslazyiterator& it) const { return iter == it.iter; } inline bool operator!=(const poslazyiterator& it) const { return iter != it.iter; } inline void getposition(int &rx, int &ry, int &rz) const { rx= x; ry = y; rz = z; } inline const int& getx() const { return x; } inline const int& gety() const { return y; } inline const int& getz() const { return z; } inline const poslazyiterator& operator=(const poslazyiterator& source) { iter = source.iter; lazyptr = source.lazyptr; lx0=source.lx0; ly0=source.ly0; lz0=source.lz0; lx1=source.lx1; ly1=source.ly1; lz1=source.lz1; x=source.x; y=source.y; z=source.z; RowAdjust = source.RowAdjust; SliceAdjust = source.SliceAdjust; return *this; } inline T& operator*() const { lazyptr->set_whole_cache_validity(false); return *iter;} }; //---------------------------------------------------------------------// // Constant, Forward Iterator template class posconstiterator { private: T* iter; int x; int y; int z; int lx0; int ly0; int lz0; int lx1; int ly1; int lz1; int RowAdjust; int SliceAdjust; void calc_offsets(int rowoff, int sliceoff) { RowAdjust = rowoff + (lx0 - lx1); SliceAdjust = sliceoff + rowoff*(ly0 - ly1) + (lx0 - lx1); } public: posconstiterator() { } posconstiterator(const posconstiterator& source) { this->operator=(source); } posconstiterator(T* sourceptr, int xinit, int yinit, int zinit, int x0, int y0, int z0, int x1, int y1, int z1, int rowoff, int sliceoff) : iter(sourceptr), x(xinit), y(yinit), z(zinit), lx0(x0), ly0(y0), lz0(z0), lx1(x1), ly1(y1), lz1(z1) { calc_offsets(rowoff,sliceoff); } ~posconstiterator() { } // do nothing inline const posconstiterator operator++(int) { posconstiterator tmp=*this; ++(*this); return tmp; } inline const posconstiterator& operator++() // prefix { x++; if (x>lx1) { x=lx0; y++; if (y>ly1) { y=ly0; z++; if (z>lz1) { ++iter; } // end condition else { iter+=SliceAdjust; } } else { iter+=RowAdjust; } } else { ++iter;} return *this; } inline bool operator==(const posconstiterator& it) const { return iter == it.iter; } inline bool operator!=(const posconstiterator& it) const { return iter != it.iter; } inline void getposition(int &rx, int &ry, int &rz) const { rx= x; ry = y; rz = z; } inline const int& getx() const { return x; } inline const int& gety() const { return y; } inline const int& getz() const { return z; } inline const posconstiterator& operator=(const posconstiterator& source) { iter = source.iter; lx0=source.lx0; ly0=source.ly0; lz0=source.lz0; lx1=source.lx1; ly1=source.ly1; lz1=source.lz1; x=source.x; y=source.y; z=source.z; RowAdjust = source.RowAdjust; SliceAdjust = source.SliceAdjust; return *this; } inline const T& operator*() const { return *iter;} }; //---------------------------------------------------------------------// } // end namespace #endif