index.h

/*
This file is distributed as part of the BIAS library (Basic ImageAlgorithmS)
but it has not been developed by the authors of BIAS.

For copyright, author and license information see below.
*/


/*
*
* Template Numerical Toolkit (TNT): Linear Algebra Module
*
* Mathematical and Computational Sciences Division
* National Institute of Technology,
* Gaithersburg, MD USA
*
*
* This software was developed at the National Institute of Standards and
* Technology (NIST) by employees of the Federal Government in the course
* of their official duties. Pursuant to title 17 Section 105 of the
* United States Code, this software is not subject to copyright protection
* and is in the public domain.  The Template Numerical Toolkit (TNT) is
* an experimental system.  NIST assumes no responsibility whatsoever for
* its use by other parties, and makes no guarantees, expressed or implied,
* about its quality, reliability, or any other characteristic.
*
* BETA VERSION INCOMPLETE AND SUBJECT TO CHANGE
* see http://math.nist.gov/tnt for latest updates.
*
*/



// Vector/Matrix/Array Index Module  

#ifndef INDEX_H
#define INDEX_H

#include "subscript.h"

namespace TNT
{

  class Index1D
  {
    Subscript lbound_;
    Subscript ubound_;

  public:

    Subscript lbound() const { return lbound_; }
    Subscript ubound() const { return ubound_; }

    Index1D(const Index1D &D) : lbound_(D.lbound_), ubound_(D.ubound_) {}
    Index1D(Subscript i1, Subscript i2) : lbound_(i1), ubound_(i2) {}

    Index1D & operator=(const Index1D &D)
    {
      lbound_ = D.lbound_;
      ubound_ = D.ubound_;
      return *this;
    }

  };

  inline Index1D operator+(const Index1D &D, Subscript i)
  {
    return Index1D(i+D.lbound(), i+D.ubound());
  }

  inline Index1D operator+(Subscript i, const Index1D &D)
  {
    return Index1D(i+D.lbound(), i+D.ubound());
  }



  inline Index1D operator-(Index1D &D, Subscript i)
  {
    return Index1D(D.lbound()-i, D.ubound()-i);
  }

  inline Index1D operator-(Subscript i, Index1D &D)
  {
    return Index1D(i-D.lbound(), i-D.ubound());
  }

} // namespace TNT

#endif