www.pudn.com > Lapackpp1_1a.zip > template_v.h

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

//  Lapack++ templated  vector class

#ifndef _VECTOR_TEMPLATE_H_
#define _VECTOR_TEMPLATE_H_    

#include        // for formatted printing of matrices
#include 

#ifndef __ASSERT_H
#include      // cheap "error" protection used in checking
#endif                  // checking array bounds.


template
typedef  struct vrep{
    int        sz;                                        
    type*    data;                                       
    int        ref_count;
} vref;
                        

template
class Vector
{                                                                      
    private:                                                           
           vref *p;
           type *data;            // performance hack, avoid type
                                    // indirection to data.
    public:                                                            
                                                                       
        /*::::::::::::::::::::::::::*/                                 
        /* Constructors/Destructors */                                 
        /*::::::::::::::::::::::::::*/                                 
                                                                       
    //inline Vector();     // this should behave as Vector(0)
    inline Vector(int);                             
    Vector(int, const type);   // can't be inlined because of 'for'
                                       // statement.
    inline Vector(type*, int);
    Vector(const Vector&); 
    inline ~Vector() ;                              
                                                                       
        /*::::::::::::::::::::::::::::::::*/                           
        /*  Indices and access operations */                           
        /*::::::::::::::::::::::::::::::::*/                           
                                                                       
    inline type&    operator[](int); 
    inline type&    operator()(int); 
    inline type&    operator()(int) const; // read only
    inline operator type*(); 
    inline int     size() const;
    inline int      null();
    int     resize(int d);
    inline int      ref_count() const;  // return the number of ref counts
    inline type*    addr() const;
                                                                       
        /*::::::::::::::*/                                             
        /*  Assignment  */                                             
        /*::::::::::::::*/                                             
                                                                       
    inline Vector& operator=(const Vector&);
    inline Vector& operator=(type);
    inline Vector& ref(const Vector &);
    Vector& inject(Vector&);
    Vector& copy(const Vector&);

    /* I/O */                                                      
    friend ostream&   operator<<(ostream&, const Vector&);       

};                                                                     

    // constructors

template
inline Vector::Vector(int n=0)
{                                                                      
    assert(n>=0);
    p = new vref;
    p->sz = n;                                                          
    p->ref_count = 1;                        
    p->data = data = new type[n]; 
}                                                                      


template
inline Vector::Vector(type *d, int n)
{                                                                      
    p = new vref;
    p->sz = n;                                                          
    p->ref_count = 2; 
    p-> data = data = d;                        
}                                                                      
                                                                       
                                                                       

template
inline Vector::~Vector()
{

        if (--(p->ref_count) == 0)              // perform garbage col.
        {
           delete [] ( (type*) p->data);
           delete p;
        }
}


    // operators and member functions

template
inline int Vector::null()
{
    return (size() == 0) ;
}

template
inline int Vector::size() const
{
    return   p-> sz;
}


template
inline int Vector::ref_count() const
{
    return p->ref_count;
}

template
inline type* Vector::addr() const
{
    return data;
}

template
inline Vector::operator type*() 
{
    return &((*this)(0));
}

template
inline type& Vector::operator()(int i)
{
#if 0   // already done by LA_BOUNDS_CHECK
    assert(0<=i && i
inline type& Vector::operator()(int i) const
{
#if 0       // already done by LA_BOUNDS_CHECK
    assert(0<=i && i
inline type& Vector::operator[](int i)
{
    assert(0<=i && i
inline Vector& Vector::ref(const Vector& m)
{
    // always check that the p field has been initialized.
    // Either the lhs or rhs could be a NULL Vector...
        m.p->ref_count++;
        if (--(p->ref_count) == 0)              // perform garbage col.
        {
           delete [] ( (type*) p->data);
           delete p;
        }
        p = m.p;
        data = m.data;
        return *this;
}


template
inline Vector& Vector::operator=(const Vector& m)
{

    return  copy(m);
}


template
inline Vector& Vector::operator=(type scalar)
{
    for (int i=0; i