/*

Copyright (C) 1999-2020 The Octave Project Developers

See the file COPYRIGHT.md in the top-level directory of this distribution
or <https://octave.org/COPYRIGHT.html/>.


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 3 of the License, 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, see
<https://www.gnu.org/licenses/>.

*/

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include "Cell.h"
#include "ovl.h"
#include "pt-arg-list.h"
#include "pt-eval.h"
#include "pt-exp.h"
#include "pt-cell.h"
#include "pt-walk.h"
#include "ov.h"

namespace octave
{
  tree_expression *
  tree_cell::dup (symbol_scope& scope) const
  {
    tree_cell *new_cell = new tree_cell (nullptr, line (), column ());

    new_cell->copy_base (*this, scope);

    return new_cell;
  }

  octave_value
  tree_cell::evaluate (tree_evaluator& tw, int)
  {
    unwind_action act ([&tw] (const std::list<octave_lvalue> *lvl)
                       {
                         tw.set_lvalue_list (lvl);
                       }, tw.lvalue_list ());
    tw.set_lvalue_list (nullptr);

    octave_idx_type nr = length ();
    octave_idx_type nc = -1;

    Cell val;

    octave_idx_type i = 0;

    for (tree_argument_list *elt : *this)
      {
        octave_value_list row = tw.convert_to_const_vector (elt);

        if (nr == 1)
          // Optimize the single row case.
          val = row.cell_value ();
        else if (nc < 0)
          {
            nc = row.length ();

            val = Cell (nr, nc);
          }
        else
          {
            octave_idx_type this_nc = row.length ();

            if (this_nc != nc)
              {
                if (this_nc == 0)
                  continue;  // blank line
                else
                  error ("number of columns must match");
              }
          }

        for (octave_idx_type j = 0; j < nc; j++)
          val(i,j) = row(j);

        i++;
      }

    if (i < nr)
      val.resize (dim_vector (i, nc));  // there were blank rows

    return octave_value (val);
  }
}