lavi.h

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// -*-C++-*- 

// Copyright (C) 2004 
// Christian Stimming <stimming@tuhh.de>

// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2, or (at
// your option) any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

//      LAPACK++ (V. 1.1)
//      (C) 1992-1996 All Rights Reserved.

#ifndef _LA_VECTOR_INT_H_
#define _LA_VECTOR_INT_H_

#include "lafnames.h"

#include LA_GEN_MAT_INT_H

class LaVectorInt: public LaGenMatInt
{
 public:

  inline LaVectorInt();

  inline LaVectorInt(int n);

  inline LaVectorInt(int m, int n);  

  inline LaVectorInt(int* v, int n);

  inline LaVectorInt(int* v, int m, int n);

  inline LaVectorInt(const LaGenMatInt&);

  LaVectorInt (const LaIndex& ind);


  inline int size() const;

  inline int inc() const;

  inline int start() const;

  inline int end() const;

  inline LaIndex index() const;

  inline int& operator()(int i);

  inline int& operator()(int i) const ;

  inline LaVectorInt operator()(const LaIndex&);

  inline LaVectorInt& operator=(int);

  inline LaVectorInt& operator=(const LaGenMatInt&);


  inline LaVectorInt& inject(const LaGenMatInt &);

  inline LaVectorInt& copy(const LaGenMatInt &);

  inline LaVectorInt& ref(const LaGenMatInt &);
    
};

// NOTE: we default to column vectors, since matrices are column
//  oriented.

inline LaVectorInt::LaVectorInt() : LaGenMatInt(0,1) {}
inline LaVectorInt::LaVectorInt(int i) : LaGenMatInt(i,1) {}

// NOTE: one shouldn't be using this method to initalize, but
// it is here so that the constructor can be overloaded with 
// a runtime test.
//
inline LaVectorInt::LaVectorInt(int m, int n) : LaGenMatInt(m,n)
{
  assert(n==1 || m==1);
}

inline LaVectorInt::LaVectorInt(int *d, int n) : 
  LaGenMatInt(d,n,1) {}

inline LaVectorInt::LaVectorInt(int *d, int n, int m) : 
  LaGenMatInt(d,n,m) {}

inline LaVectorInt::LaVectorInt(const LaGenMatInt &G) 
{
  assert(G.size(0)==1 || G.size(1)==1);

  (*this).ref(G);
}


//note that vectors can be either stored columnwise, or row-wise

// this will handle the 0x0 case as well.

inline int LaVectorInt::size() const 
{ return LaGenMatInt::size(0)*LaGenMatInt::size(1); }

inline int& LaVectorInt::operator()(int i)
{ if (LaGenMatInt::size(0)==1 )
  return LaGenMatInt::operator()(0,i);
 else
   return LaGenMatInt::operator()(i,0);
}

inline int& LaVectorInt::operator()(int i) const
{ if (LaGenMatInt::size(0)==1 )
  return LaGenMatInt::operator()(0,i);
 else
   return LaGenMatInt::operator()(i,0);
}

inline LaVectorInt LaVectorInt::operator()(const LaIndex& I)
{ if (LaGenMatInt::size(0)==1)
  return LaGenMatInt::operator()(LaIndex(0,0),I).shallow_assign(); 
 else
   return LaGenMatInt::operator()(I,LaIndex(0,0)).shallow_assign(); 
}


inline LaVectorInt& LaVectorInt::copy(const LaGenMatInt &A)
{
  assert(A.size(0) == 1 || A.size(1) == 1);   //make sure rhs is a
  // a vector.
  LaGenMatInt::copy(A);
  return *this;
}

inline LaVectorInt& LaVectorInt::operator=(const  LaGenMatInt &A)
{
  return inject(A);
}

inline LaVectorInt& LaVectorInt::ref(const LaGenMatInt &A)
{
  assert(A.size(0) == 1 || A.size(1) == 1);
  LaGenMatInt::ref(A);
  return *this;
}

inline LaVectorInt& LaVectorInt::operator=(int d)
{
  LaGenMatInt::operator=(d);
  return *this;
}

inline LaVectorInt& LaVectorInt::inject(const LaGenMatInt &A)
{
  assert(A.size(0) == 1 || A.size(1) == 1);
  LaGenMatInt::inject(A);
  return *this;
}
    
inline int LaVectorInt::inc() const
{
   if (LaGenMatInt::size(1)==1 )
      return LaGenMatInt::inc(0);
   else
      return LaGenMatInt::inc(1)*LaGenMatInt::gdim(0);
   // NOTE: This was changed on 2005-03-04 because without the dim[0]
   // this gives wrong results on non-unit-stride submatrix views.
}

inline LaIndex LaVectorInt::index() const
{
  if (LaGenMatInt::size(1)==1 )
    return LaGenMatInt::index(0);
  else
    return LaGenMatInt::index(1);
}

inline int LaVectorInt::start() const
{
  if (LaGenMatInt::size(1)==1 )
    return LaGenMatInt::start(0);
  else
    return LaGenMatInt::start(1);
}

inline int LaVectorInt::end() const
{
  if (LaGenMatInt::size(1)==1 )
    return LaGenMatInt::end(0);
  else
    return LaGenMatInt::end(1);
}

#endif 
// _LA_VECTOR_INT_H_

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