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// Template array classes
/*
Copyright (C) 1996, 1997 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
Octave 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 General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION)
#pragma implementation
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cassert>
#include <iostream>
#include "DiagArray2.h"
#include "lo-error.h"
// A two-dimensional array with diagonal elements only.
template <class T>
T
DiagArray2<T>::elem (int r, int c) const
{
return (r == c) ? Array<T>::xelem (r) : T (0);
}
template <class T>
T
DiagArray2<T>::checkelem (int r, int c) const
{
if (r < 0 || c < 0 || r >= this->dim1 () || c >= this->dim2 ())
{
(*current_liboctave_error_handler) ("range error in DiagArray2");
return T ();
}
return (r == c) ? Array<T>::xelem (r) : T (0);
}
template <class T>
T
DiagArray2<T>::operator () (int r, int c) const
{
if (r < 0 || c < 0 || r >= this->dim1 () || c >= this->dim2 ())
{
(*current_liboctave_error_handler) ("range error in DiagArray2");
return T ();
}
return (r == c) ? Array<T>::xelem (r) : T (0);
}
template <class T>
T&
DiagArray2<T>::xelem (int r, int c)
{
static T foo;
return (r == c) ? Array<T>::xelem (r) : foo;
}
template <class T>
T
DiagArray2<T>::xelem (int r, int c) const
{
return (r == c) ? Array<T>::xelem (r) : T (0);
}
template <class T>
void
DiagArray2<T>::resize (int r, int c)
{
if (r < 0 || c < 0)
{
(*current_liboctave_error_handler) ("can't resize to negative dimensions");
return;
}
if (r == this->dim1 () && c == this->dim2 ())
return;
typename Array<T>::ArrayRep *old_rep = Array<T>::rep;
const T *old_data = this->data ();
int old_len = this->length ();
int new_len = r < c ? r : c;
Array<T>::rep = new typename Array<T>::ArrayRep (new_len);
this->dimensions = dim_vector (r, c);
if (old_data && old_len > 0)
{
int min_len = old_len < new_len ? old_len : new_len;
for (int i = 0; i < min_len; i++)
xelem (i, i) = old_data[i];
}
if (--old_rep->count <= 0)
delete old_rep;
}
template <class T>
void
DiagArray2<T>::resize (int r, int c, const T& val)
{
if (r < 0 || c < 0)
{
(*current_liboctave_error_handler) ("can't resize to negative dimensions");
return;
}
if (r == this->dim1 () && c == this->dim2 ())
return;
typename Array<T>::ArrayRep *old_rep = Array<T>::rep;
const T *old_data = this->data ();
int old_len = this->length ();
int new_len = r < c ? r : c;
Array<T>::rep = new typename Array<T>::ArrayRep (new_len);
this->dimensions = dim_vector (r, c);
int min_len = old_len < new_len ? old_len : new_len;
if (old_data && old_len > 0)
{
for (int i = 0; i < min_len; i++)
xelem (i, i) = old_data[i];
}
for (int i = min_len; i < new_len; i++)
xelem (i, i) = val;
if (--old_rep->count <= 0)
delete old_rep;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
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