/* Removing space dimensions form an NNC polyhedron.
   Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
   Copyright (C) 2010-2016 BUGSENG srl (http://bugseng.com)

This file is part of the Parma Polyhedra Library (PPL).

The PPL 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.

The PPL 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 this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.

For the most up-to-date information see the Parma Polyhedra Library
site: http://bugseng.com/products/ppl/ . */

#include "ppl_test.hh"

namespace {

bool
test01() {
  Variable x(0);
  Variable y(1);
  Variable z(2);

  NNC_Polyhedron ph1(4);

  ph1.add_constraint(x - y == 3);
  ph1.add_constraint(z > x + 4);
  ph1.add_constraint(y < 6);

  print_constraints(ph1, "*** ph1 ***");

  NNC_Polyhedron ph2(ph1);

  ph1.remove_higher_space_dimensions(1);

  // This is the set of the variables that we want to remove.
  Variables_Set to_be_removed;
  to_be_removed.insert(y);
  to_be_removed.insert(z);
  to_be_removed.insert(Variable(3));

  ph2.remove_space_dimensions(to_be_removed);

  bool ok = (ph1 == ph2);

  print_constraints(ph1, "*** after remove_higher_space_dimensions(1) ***");
  print_constraints(ph2,
                    "*** after remove_space_dimensions(to_be_removed) ***");

  return ok;
}

bool
test02() {
  Variable x(0);
  Variable y(1);
  Variable z(2);

  NNC_Polyhedron ph(3);

  ph.add_constraint(x >= 1);
  ph.add_constraint(y >= 1);
  ph.add_constraint(z >= 1);

  print_generators(ph, "*** ph ***");

  Variables_Set to_be_removed;
  to_be_removed.insert(x);
  to_be_removed.insert(z);

  ph.remove_space_dimensions(to_be_removed);

  NNC_Polyhedron known_result(1);
  known_result.add_constraint(x >= 1);

  bool ok = (ph == known_result);

  print_constraints(ph, "*** ph.remove_space_dimensions() ***");
  print_constraints(known_result, "*** known_result ***");

  return ok;
}

} // namespace

BEGIN_MAIN
  DO_TEST(test01);
  DO_TEST(test02);
END_MAIN
