/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*//*                                                                           *//*                                                                           *//*                   MV++ Numerical Matrix/Vector C++ Library                *//*                             MV++ Version 1.5                              *//*                                                                           *//*                                  R. Pozo                                  *//*               National Institute of Standards and Technology              *//*                                                                           *//*                                  NOTICE                                   *//*                                                                           *//* Permission to use, copy, modify, and distribute this software and         *//* its documentation for any purpose and without fee is hereby granted       *//* provided that this permission notice appear in all copies and             *//* supporting documentation.                                                 *//*                                                                           *//* Neither the Institution (National Institute of Standards and Technology)  *//* nor the author makes any representations about the suitability of this    *//* software for any purpose.  This software is provided ``as is''without     *//* expressed or implied warranty.                                            *//*                                                                           *//*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/////      mvvind.h        MV_Vector Index class#ifndef _MV_VEC_INDEX_H_#define _MV_VEC_INDEX_H_// A MV_VecIndex is an ordered pair (start,end) denoting a subvector//  region, similar to a Fortran 90 or Matlab colon notation.  For example, ////  MV_Vector_double A(10), B(20);//  MV_VecIndex I(2,4);////  A(I) = B(MV_VecIndex(0,2); ////  sets the thrid through fifth elements of A to the first two elements//  of B.  There is no stride argument, only contiguous regions are allowed.//#include <assert.h>class MV_VecIndex{    private:             int start_;             int end_;                   char all_;      // true if this index refers to the complete                            // vector range.  start_ and end_ are ignored.    public:        MV_VecIndex() : start_(0), end_(0), all_(1) {}        MV_VecIndex( int i1) :start_(i1), end_(i1), all_(0) {}        MV_VecIndex( int i1,  int i2): start_(i1), end_(i2),            all_(0)        {            assert(i1 <= i2);        }        MV_VecIndex(const MV_VecIndex &s) : start_(s.start_), end_(s.end_),             all_(s.all_){}        int start() const { return (all_==1) ? 0 : start_;}        int end() const { return (all_ ==1) ? 0 : end_;}        int length() const {             return (all_==1) ? 0 : (end_-start_+1);}        int all() const { return all_; }        MV_VecIndex& operator=(const MV_VecIndex& I)            { start_=I.start_; end_ = I.end_; return *this;}        MV_VecIndex operator+(int i)            { return MV_VecIndex(start_ +i, end_ +i); }        MV_VecIndex& operator+=(int i)            { start_ += i; end_ += i; return *this; }        MV_VecIndex operator-(int i)            { return MV_VecIndex(start_ -i, end_ -i); }        MV_VecIndex& operator-=(int i)            { start_ -= i; end_ -= i; return *this; }};#endif  //  _INDEX_H_