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DenseVector.h
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Fri, Apr 4, 13:19

DenseVector.h
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#ifndef DENSEVECTOR_H
#define DENSEVECTOR_H
#include "Vector.h"
namespace ATC_matrix {
template<typename T>
/**
* @class DenseVector
* @brief Class for storing data in a "dense" vector form
*/
class DenseVector : public Vector<T>
{
public:
explicit DenseVector(INDEX n=0, bool z=1) { _create(n,z); }
DenseVector(const DenseVector<T> &c) : _data(NULL) { _copy(c); }
DenseVector(const Vector<T> &c) : _data(NULL) { _copy(c); }
DenseVector(const T * ptr, INDEX nrows) : _data(NULL) { copy(ptr,nrows); }
virtual ~DenseVector() { _delete(); }
//* resizes the Vector, ignores nCols, optionally copys what fits
void resize(INDEX rows, INDEX cols=1, bool copy=false);
//* resizes the Vector, ignores nCols, optionally zeros it out
void reset (INDEX rows, INDEX cols=1, bool zero=true);
//* resizes the Vector and copies data, ignores nCols
void copy(const T * ptr, INDEX rows, INDEX cols=1);
// overloaded inline virtual functions
T operator[](INDEX i) const { VICK(i) return _data[i]; }
T& operator[](INDEX i) { VICK(i) return _data[i]; }
T operator()(INDEX i, INDEX j=0) const { VICK(i) return _data[i]; }
T& operator()(INDEX i, INDEX j=0) { VICK(i) return _data[i]; }
void set_all_elements_to(const T &v) {
int sz = this->size();
for (INDEX i = 0; i < sz; i++) _data[i] = v;
}
INDEX nRows() const { return _size; }
T* ptr() const { return _data; }
DenseVector<T>& operator=(const T &v);
DenseVector<T>& operator=(const Vector<T> &c);
DenseVector<T>& operator=(const DenseVector<T> &c);
void write_restart(FILE *f) const;
private:
void _delete();
void _create(INDEX n, bool zero=0);
void _copy(const Vector<T> &c);
T *_data;
INDEX _size;
};
///////////////////////////////////////////////////////////////////////////////
// Template definitions ///////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
// resizes the matrix and optionally copies over what still fits, ignores cols
//-----------------------------------------------------------------------------
template <typename T>
void DenseVector<T>::resize(INDEX rows, INDEX cols, bool copy)
{
if (_size==rows) return; // if is correct size, done
if (!copy)
{
_delete();
_create(rows);
return;
}
DenseVector<T> temp(*this);
_delete();
_create(rows);
int sz = this->size();
for (INDEX i = 0; i < sz; i++)
_data[i] = i<temp.size() ? temp[i] : T(0.0);
return;
}
///////////////////////////////////////////////////////////////////////////////
//* resizes the matrix and optionally zeros it out
template <typename T>
void DenseVector<T>::reset(INDEX rows, INDEX cols, bool zero)
{
if (_size!=rows)
{
_delete();
_create(rows);
}
if (zero) this->zero();
}
///////////////////////////////////////////////////////////////////////////////
//* resizes the matrix and optionally zeros it out
template <typename T>
void DenseVector<T>::copy(const T * ptr, INDEX rows, INDEX cols)
{
resize(rows, 1, false);
memcpy(_data, ptr, this->size()*sizeof(T));
}
///////////////////////////////////////////////////////////////////////////////
//* writes the matrix data to a file
template <typename T>
void DenseVector<T>::write_restart(FILE *f) const
{
fwrite(&_size, sizeof(INDEX),1,f);
if(_size) fwrite(_data, sizeof(T), _size, f);
}
///////////////////////////////////////////////////////////////////////////////
//* clears allocated memory
template <typename T>
inline void DenseVector<T>::_delete()
{
if (_data) delete [] _data;
_size = 0;
}
///////////////////////////////////////////////////////////////////////////////
//* allocates memory for an rows by cols DenseMatrix
template <typename T>
inline void DenseVector<T>::_create(INDEX n, bool zero)
{
_size=n;
_data = _size ? new T [_size] : NULL ;
if (zero) this->zero();
}
///////////////////////////////////////////////////////////////////////////////
//* creates a deep memory copy from a general matrix
template <typename T>
inline void DenseVector<T>::_copy(const Vector<T> &c)
{
if (!_data || _size!=c.size())
{
_delete();
_create(c.size(), false);
}
else _size = c.size();
memcpy(_data, c.ptr(), _size*sizeof(T));
}
///////////////////////////////////////////////////////////////////////////////
//* assigns v to all values in the vector
template <typename T>
DenseVector<T>& DenseVector<T>::operator=(const T &v)
{
int sz = this->size();
for (INDEX i = 0; i < sz; i++) (*this)[i] = v;
return *this;
}
///////////////////////////////////////////////////////////////////////////////
//* copys c with a deep copy
template <typename T>
DenseVector<T>& DenseVector<T>::operator=(const Vector<T> &c)
{
_copy(c);
return *this;
}
///////////////////////////////////////////////////////////////////////////////
//* copys c with a deep copy
template <typename T>
DenseVector<T>& DenseVector<T>::operator=(const DenseVector<T> &c)
{
_copy(c);
return *this;
}
} // end namespace
#endif

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