/* Test Grid::is_disjoint_from().
   Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
   Copyright (C) 2010-2011 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://www.cs.unipr.it/ppl/ . */

#include "ppl_test.hh"

using namespace Parma_Polyhedra_Library::IO_Operators;

namespace {

// Grid of points and empty grid.
bool
test01() {
  Variable A(0);

  Grid_Generator_System gs;
  gs.insert(grid_point(A));

  Grid gr1(gs);

  Grid gr2(1, EMPTY);

  bool ok = (gr1.is_disjoint_from(gr2));
  print_congruences(gr1, "*** gr1 ***");
  print_congruences(gr2, "*** gr2 ***");

  return ok;
}

// Empty grid and grid of points.
bool
test02() {
  Variable B(1);

  Grid gr1(2, EMPTY);

  Grid_Generator_System gs;
  gs.insert(grid_point());
  gs.insert(grid_point(B));

  Grid gr2(gs);

  bool ok = (gr1.is_disjoint_from(gr2));
  print_congruences(gr1, "*** gr1 ***");
  print_congruences(gr2, "*** gr2 ***");

  return ok;
}

// Both empty.
bool
test03() {
  Grid gr1(4, EMPTY);

  Grid gr2(4, EMPTY);

  bool ok = (gr1.is_disjoint_from(gr2));
  print_congruences(gr1, "*** gr1 ***");
  print_congruences(gr2, "*** gr2 ***");

  return ok;
}

// Zero dimension universes.
bool
test04() {
  Grid gr1(0);

  Grid gr2(0);

  bool ok = (!gr1.is_disjoint_from(gr2));
  print_congruences(gr1, "*** gr1 ***");
  print_congruences(gr2, "*** gr2 ***");

  return ok;
}

// Grid and itself.
bool
test05() {
  Variable A(0);
  Variable B(1);
  Variable C(2);

  Grid gr(3);
  gr.add_congruence(A - B %= 0);
  gr.add_congruence(C %= 0);

  bool ok = (!gr.is_disjoint_from(gr));
  print_congruences(gr, "*** gr ***");

  return ok;
}

// Two grids which alternate AB planes along C.
bool
test06() {
  Variable A(0);
  Variable B(1);
  Variable C(2);

  Grid gr1(3);
  gr1.add_congruence(A - B %= 0);
  gr1.add_congruence((C %= 0) / 2);

  Grid gr2(3, EMPTY);
  gr2.add_grid_generator(grid_point(C));
  gr2.add_grid_generator(grid_line(A + B));
  gr2.add_grid_generator(grid_point(C + B));
  gr2.add_grid_generator(grid_point(3*C));

  bool ok = (gr1.is_disjoint_from(gr2));
  print_congruences(gr1, "*** gr1 ***");
  print_congruences(gr2, "*** gr2 ***");

  return ok;
}

// A sequence of points and a plane.
bool
test07() {
  Variable A(0);
  Variable B(1);
  Variable C(2);

  Grid gr1(3, EMPTY);
  gr1.add_grid_generator(grid_point(A + B + C));
  gr1.add_grid_generator(grid_point(3*A + 3*B + 3*C));

  Grid gr2(3);
  gr2.add_congruence(A - B %= 0);
  gr2.add_constraint(C == 0);

  bool ok = (gr1.is_disjoint_from(gr2));
  print_congruences(gr1, "*** gr1 ***");
  print_congruences(gr2, "*** gr2 ***");

  return ok;
}

// A line and a plane.
bool
test08() {
  Variable A(0);
  Variable B(1);
  Variable C(2);

  Grid gr1(3, EMPTY);
  gr1.add_grid_generator(grid_point(A + B + C));
  gr1.add_grid_generator(grid_line(3*A + 3*B + 3*C));

  Grid gr2(3);
  gr2.add_congruence(A - B %= 0);
  gr2.add_constraint(C == 0);

  bool ok = (!gr1.is_disjoint_from(gr2));
  print_congruences(gr1, "*** gr1 ***");
  print_congruences(gr2, "*** gr2 ***");

  return ok;
}

// CHINA contains example that showed an error in cgs::is_included_in.
bool
test09() {
  Variable A(0);

  Grid gr1(1, EMPTY);
  gr1.add_grid_generator(grid_point());
  gr1.minimized_grid_generators();

  Grid gr2(1, EMPTY);
  gr2.add_grid_generator(grid_point(A));
  gr2.minimized_grid_generators();

  bool ok = (gr1.is_disjoint_from(gr2));
  print_congruences(gr2, "*** gr2 ***");
  print_congruences(gr1, "*** gr1.is_disjoint_from(gr2) ***");

  return ok;
}

// Space dimension exception.
bool
test10() {
  Grid gr1(1, EMPTY);
  gr1.add_grid_generator(grid_point());

  Grid gr2(19, EMPTY);

  try {
    gr1.is_disjoint_from(gr2);
  }
  catch (const std::invalid_argument& e) {
    nout << "invalid_argument: " << e.what() << endl;
    return true;
  }
  catch (...) {
  }
  return false;
}

// Both empty and both not in minimal form.
bool
test11() {
  Variable A(0);
  Grid gr1(1);
  gr1.add_congruence((A %= 1) / 2);
  gr1.add_congruence((A %= 0) / 2);

  Grid gr2(1);
  gr2.add_congruence((A %= 1) / 2);
  gr2.add_congruence((A %= 0) / 2);

  bool ok = (gr1.is_disjoint_from(gr2));
  print_congruences(gr1, "*** gr1 ***");
  print_congruences(gr2, "*** gr2 ***");

  return ok;
}

} // namespace

BEGIN_MAIN
  DO_TEST(test01);
  DO_TEST(test02);
  DO_TEST(test03);
  DO_TEST(test04);
  DO_TEST(test05);
  DO_TEST(test06);
  DO_TEST(test07);
  DO_TEST(test08);
  DO_TEST(test09);
  DO_TEST(test10);
  DO_TEST(test11);
END_MAIN
