/*

Copyright (C) 1996-2011 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 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
<http://www.gnu.org/licenses/>.

*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <typeinfo>

#include "quit.h"

#include "defun.h"
#include "error.h"
#include "gripes.h"
#include "ov.h"
#include "oct-lvalue.h"
#include "input.h"
#include "pager.h"
#include "pt-bp.h"
#include "pt-cmd.h"
#include "pt-id.h"
#include "pt-idx.h"
#include "pt-jump.h"
#include "pt-pr-code.h"
#include "pt-stmt.h"
#include "pt-walk.h"
#include "unwind-prot.h"
#include "utils.h"
#include "variables.h"

// A list of commands to be executed.

tree_statement::~tree_statement (void)
{
  delete cmd;
  delete expr;
  delete comm;
}

void
tree_statement::set_print_flag (bool print_flag)
{
  if (expr)
    expr->set_print_flag (print_flag);
}

bool
tree_statement::print_result (void)
{
  return expr && expr->print_result ();
}

void
tree_statement::set_breakpoint (void)
{
  if (cmd)
    cmd->set_breakpoint ();
  else if (expr)
    expr->set_breakpoint ();
}

void
tree_statement::delete_breakpoint (void)
{
  if (cmd)
    cmd->delete_breakpoint ();
  else if (expr)
    expr->delete_breakpoint ();
}

bool
tree_statement::is_breakpoint (void) const
{
  return cmd ? cmd->is_breakpoint () : (expr ? expr->is_breakpoint () : false);
}

int
tree_statement::line (void) const
{
  return cmd ? cmd->line () : (expr ? expr->line () : -1);
}

int
tree_statement::column (void) const
{
  return cmd ? cmd->column () : (expr ? expr->column () : -1);
}

void
tree_statement::echo_code (void)
{
  tree_print_code tpc (octave_stdout, VPS4);

  accept (tpc);
}

bool
tree_statement::is_end_of_fcn_or_script (void) const
{
  bool retval = false;

  if (cmd)
    {
      tree_no_op_command *no_op_cmd
        = dynamic_cast<tree_no_op_command *> (cmd);

      if (no_op_cmd)
        retval = no_op_cmd->is_end_of_fcn_or_script ();
    }

  return retval;
}

tree_statement *
tree_statement::dup (symbol_table::scope_id scope,
                     symbol_table::context_id context) const
{
  tree_statement *new_stmt = new tree_statement ();

  new_stmt->cmd = cmd ? cmd->dup (scope, context) : 0;

  new_stmt->expr = expr ? expr->dup (scope, context) : 0;

  new_stmt->comm = comm ? comm->dup () : 0;

  return new_stmt;
}

void
tree_statement::accept (tree_walker& tw)
{
  tw.visit_statement (*this);
}

int
tree_statement_list::set_breakpoint (int line)
{
  tree_breakpoint tbp (line, tree_breakpoint::set);
  accept (tbp);

  return tbp.get_line ();
}

void
tree_statement_list::delete_breakpoint (int line)
{
  if (line < 0)
    {
      octave_value_list bp_lst = list_breakpoints ();

      int len = bp_lst.length ();

      for (int i = 0; i < len; i++)
        {
          tree_breakpoint tbp (i, tree_breakpoint::clear);
          accept (tbp);
        }
    }
  else
    {
      tree_breakpoint tbp (line, tree_breakpoint::clear);
      accept (tbp);
    }
}

octave_value_list
tree_statement_list::list_breakpoints (void)
{
  tree_breakpoint tbp (0, tree_breakpoint::list);
  accept (tbp);

  return tbp.get_list ();
}

tree_statement_list *
tree_statement_list::dup (symbol_table::scope_id scope,
                          symbol_table::context_id context) const
{
  tree_statement_list *new_list = new tree_statement_list ();

  new_list->function_body = function_body;

  for (const_iterator p = begin (); p != end (); p++)
    {
      const tree_statement *elt = *p;

      new_list->append (elt ? elt->dup (scope, context) : 0);
    }

  return new_list;
}

void
tree_statement_list::accept (tree_walker& tw)
{
  tw.visit_statement_list (*this);
}
