/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
/*                                                                           */
/*                                                                           */
/*                   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.                                            */
/*                                                                           */
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

//
//      mvvtp.h     Basic templated vector class
//

#ifndef _MV_VECTOR_TPL_H_
#define _MV_VECTOR_TPL_H_    

#include <stdlib.h>
#ifdef MV_VECTOR_BOUNDS_CHECK
#   include <assert.h>
#endif

#include "mvvind.h"
#include "mvvrf.h"

template <class TYPE>
class MV_Vector
{                                                                      
    protected:                                                           
           TYPE *p_;
           unsigned int dim_;
           int ref_;  // 0 or 1; does this own its own memory space?
    public:                                                            


        /*::::::::::::::::::::::::::*/                                 
        /* Constructors/Destructors */                                 
        /*::::::::::::::::::::::::::*/                                 
                                                                       
    MV_Vector();                             
    MV_Vector(unsigned int);                             
    MV_Vector(unsigned int, const TYPE&);   
                                       
    MV_Vector(TYPE*, unsigned int);     
    MV_Vector(const TYPE*, unsigned int);       
    
    // reference of an exisiting data structure
    //
    MV_Vector(TYPE*, unsigned int, MV_Vector_::ref_type i); 
    MV_Vector(const MV_Vector<TYPE>&); 
    ~MV_Vector();                              
                                                                       
        /*::::::::::::::::::::::::::::::::*/                           
        /*  Indices and access operations */                           
        /*::::::::::::::::::::::::::::::::*/                           
                                                                       

    inline            TYPE&     operator()(unsigned int i)
                  {
#                   ifdef MV_VECTOR_BOUNDS_CHECK
                    assert(i < dim_);
#                   endif
                    return p_[i];
                  }
    inline  const  TYPE&    operator()(unsigned int i) const 
                  {
#                   ifdef MV_VECTOR_BOUNDS_CHECK
                    assert(i < dim_);
#                   endif
                    return p_[i];
                  }

    inline        TYPE&     operator[](unsigned int i)
                  {
#                   ifdef MV_VECTOR_BOUNDS_CHECK
                    assert(i < dim_);
#                   endif
                    return p_[i];
                  }
    inline      const  TYPE&    operator[](unsigned int i) const 
                  {
#                   ifdef MV_VECTOR_BOUNDS_CHECK
                    assert(i < dim_);
#                   endif
                    return p_[i];
                  }



    inline MV_Vector<TYPE> operator()(const MV_VecIndex &I) ;
    inline MV_Vector<TYPE> operator()(void);
    inline const MV_Vector<TYPE> operator()(void) const;
    inline const MV_Vector<TYPE> operator()(const MV_VecIndex &I) const;

    inline unsigned int             size() const { return dim_;}
    inline int                      ref() const { return  ref_;}
    inline int                      null() const {return dim_== 0;}
            //
            // Create a new *uninitalized* vector of size N
            MV_Vector<TYPE> & newsize(unsigned int );
                                                                       
        /*::::::::::::::*/                                             
        /*  Assignment  */                                             
        /*::::::::::::::*/                                             
                                                                       
            MV_Vector<TYPE> & operator=(const MV_Vector<TYPE>&);
            MV_Vector<TYPE> & operator=(const TYPE&);



};                                                                     

    
template <class TYPE>
MV_Vector<TYPE>::MV_Vector()  : p_(0), dim_(0) , ref_(0){};

template <class TYPE>
MV_Vector<TYPE>::MV_Vector(unsigned int n) : p_(new TYPE[n]), dim_(n), 
            ref_(0)
{
    if (p_ == NULL)
    {
        cerr << "Error: NULL pointer in MV_Vector(int) constructor " << endl;
        cerr << "       Most likely out of memory... " << endl;
        exit(1);
    }
}

template <class TYPE>
MV_Vector<TYPE>::MV_Vector(unsigned int n, const TYPE& v) : 
        p_(new TYPE[n]), dim_(n), ref_(0)
{
    if (p_ == NULL)
    {
        cerr << "Error: NULL pointer in MV_Vector(int) constructor " << endl;
        cerr << "       Most likely out of memory... " << endl;
        exit(1);
    }
    for (int i=0; i<n; i++)
        p_[i] = v;
}

// operators and member functions
//




template <class TYPE>
MV_Vector<TYPE>& MV_Vector<TYPE>::operator=(const TYPE & m) 
{
#ifdef TRACE_VEC
    cout << "> MV_Vector<TYPE>::operator=(const TYPE & m)  " << endl;
#endif

    // unroll loops to depth of length 4

    int N = size();

    int Nminus4 = N-4;
    int i;

    for (i=0; i<Nminus4; )
    {
        p_[i++] = m;
        p_[i++] = m;
        p_[i++] = m;
        p_[i++] = m;
    }

    for (; i<N; p_[i++] = m);   // finish off last piece...

#ifdef TRACE_VEC
    cout << "< MV_Vector<TYPE>::operator=(const TYPE & m)  " << endl;
#endif
    return *this;
}

template <class TYPE>
MV_Vector<TYPE>& MV_Vector<TYPE>::newsize(unsigned int n)
{
#ifdef TRACE_VEC
    cout << "> MV_Vector<TYPE>::newsize(unsigned int n) " << endl;
#endif
    if (ref_ )                  // is this structure just a pointer?
    {
        {
            cerr << "MV_Vector::newsize can't operator on references.\n";
            exit(1);
        }
    }
    else
    if (dim_ != n )                     // only delete and new if
    {                                   // the size of memory is really
        if (p_) delete [] p_;           // changing, otherwise just
        p_ = new TYPE[n];               // copy in place.
        if (p_ == NULL)
        {
            cerr << "Error : NULL pointer in operator= " << endl;
            exit(1);
        }
        dim_ = n;
    }

#ifdef TRACE_VEC
    cout << "< MV_Vector<TYPE>::newsize(unsigned int n) " << endl;
#endif

    return *this;
}


    

template <class TYPE>
MV_Vector<TYPE>& MV_Vector<TYPE>::operator=(const MV_Vector<TYPE> & m) 
{

    int N = m.dim_;
    int i;

    if (ref_ )                  // is this structure just a pointer?
    {
        if (dim_ != m.dim_)     // check conformance,
        {
            cerr << "MV_VectorRef::operator=  non-conformant assignment.\n";
            exit(1);
        }

        // handle overlapping matrix references
        if ((m.p_ + m.dim_) >= p_)
        {
            // overlap case, copy backwards to avoid overwriting results
            for (i= N-1; i>=0; i--)
                p_[i] = m.p_[i];
        }
        else
        {
            for (i=0; i<N; i++)
                p_[i] = m.p_[i];
        }
                
    }
    else
    {
        newsize(N);

        // no need to test for overlap, since this region is new
        for (i =0; i< N; i++)       // careful not to use bcopy()
            p_[i] = m.p_[i];                // here, but TYPE::operator= TYPE.
    }
    return *this;   
}

template <class TYPE>
MV_Vector<TYPE>::MV_Vector(const MV_Vector<TYPE> & m) : p_(new TYPE[m.dim_]), 
    dim_(m.dim_) , ref_(0)
{
    if (p_ == NULL)
    {
        cerr << "Error:  Null pointer in MV_Vector(const MV_Vector&); " << endl;
        exit(1);
    }

    int N = m.dim_;

    for (int i=0; i<N; i++)
        p_[i] = m.p_[i];
}

// note that ref() is initalized with i rather than 1.
// this is so compilers will not generate a warning that i was
// not used in the construction.  (MV_Vector::ref_type is an enum that
// can *only* have the value of 1.
//
template <class TYPE>
MV_Vector<TYPE>::MV_Vector(TYPE* d, unsigned int n, MV_Vector_::ref_type i) : 
        p_(d), dim_(n) , ref_(i) {}

template <class TYPE>
MV_Vector<TYPE>::MV_Vector(TYPE* d, unsigned int n) : p_(new TYPE[n]), 
      dim_(n) , ref_(0)
{
    if (p_ == NULL)
    {
        cerr << "Error: Null pointer in MV_Vector(TYPE*, int) " << endl;
        exit(1);
    }
    for (int i=0; i<n; i++)
        p_[i] = d[i];

}


template <class TYPE>
MV_Vector<TYPE>::MV_Vector(const TYPE* d, unsigned int n) : p_(new TYPE[n]), 
      dim_(n) , ref_(0)
{
    if (p_ == NULL)
    {
        cerr << "Error: Null pointer in MV_Vector(TYPE*, int) " << endl;
        exit(1);
    }
    for (int i=0; i<n; i++)
        p_[i] = d[i];

}

template <class TYPE>
MV_Vector<TYPE> MV_Vector<TYPE>::operator()(void)
{
    return MV_Vector<TYPE>(p_, dim_, MV_Vector_::ref);
}

template <class TYPE>
const MV_Vector<TYPE> MV_Vector<TYPE>::operator()(void) const
{
    return MV_Vector<TYPE>(p_, dim_, MV_Vector_::ref);
}

template <class TYPE>
MV_Vector<TYPE> MV_Vector<TYPE>::operator()(const MV_VecIndex &I) 
{
    // default parameters
    if (I.all())
        return MV_Vector<TYPE>(p_, dim_, MV_Vector_::ref);
    else
    {
    // check that index is not out of bounds
    //
        if ( I.end() >= dim_)
        {
            cerr << "MV_VecIndex: (" << I.start() << ":" << I.end() << 
                ") too big for matrix (0:" << dim_ - 1 << ") " << endl;
            exit(1);
        }
        return MV_Vector<TYPE>(p_+ I.start(), I.end() - I.start() + 1,
            MV_Vector_::ref);
    }
}

template <class TYPE>
const MV_Vector<TYPE> MV_Vector<TYPE>::operator()(const MV_VecIndex &I) const
{
    // check that index is not out of bounds
    //
    if ( I.end() >= dim_)
    {
        cerr << "MV_VecIndex: (" << I.start() << ":" << I.end() << 
                ") too big for matrix (0:" << dim_ - 1 << ") " << endl;
        exit(1);
    }
    return MV_Vector<TYPE>(p_+ I.start(), I.end() - I.start() + 1,
            MV_Vector_::ref);
}

template <class TYPE>
MV_Vector<TYPE>::~MV_Vector()
{
        if (p_ && !ref_ ) delete [] p_;
}


template <class TYPE>
class FMV_Vector : public MV_Vector<TYPE>
{                                                                      
    public:                                                            
        FMV_Vector(unsigned int n) : MV_Vector<TYPE>(n) {}
        FMV_Vector<TYPE>& operator=(const FMV_Vector<TYPE>& m);
        FMV_Vector<TYPE>& operator=(const TYPE& m);
};

template <class TYPE>
FMV_Vector<TYPE>& FMV_Vector<TYPE>::operator=( const FMV_Vector<TYPE>& m)
{

#ifdef TRACE_VEC
    cout << "> FMV_Vector<TYPE>::operator=( const FMV_Vector<TYPE>& m)" << endl;
#endif

    int N = m.dim_;



    if (ref_ )                  // is this structure just a pointer?
    {
        if (dim_ != m.dim_)     // check conformance,
        {
            cerr << "MV_VectorRef::operator=  non-conformant assignment.\n";
            exit(1);
        }
    }
    else if ( dim_ != m.dim_ )      // resize only if necessary
        newsize(N);

    memmove(p_, m.p_, N * sizeof(TYPE));

#ifdef TRACE_VEC
    cout << "< FMV_Vector<TYPE>::operator=( const FMV_Vector<TYPE>& m)" << endl;
#endif

    return *this;   
}

template <class TYPE>
FMV_Vector<TYPE>& FMV_Vector<TYPE>::operator=(const TYPE & m) 
{
#ifdef TRACE_VEC
    cout << "> FMV_Vector<TYPE>::operator=(const TYPE & m)  " << endl;
#endif

    // unroll loops to depth of length 4

    int N = size();

    int Nminus4 = N-4;
    int i;

    for (i=0; i<Nminus4; )
    {
        p_[i++] = m;
        p_[i++] = m;
        p_[i++] = m;
        p_[i++] = m;
    }

    for (; i<N; p_[i++] = m);   // finish off last piece...

#ifdef TRACE_VEC
    cout << "< FMV_Vector<TYPE>::operator=(const TYPE & m)  " << endl;
#endif
    return *this;
}

#include "mvblas.h"

#endif 
// _MV_VECTOR_TPL_H_