/* Non-inline functions for the Interval class and its constituents.
   Copyright (C) 2001-2004 Roberto Bagnara <bagnara@cs.unipr.it>

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 2 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., 59 Temple Place - Suite 330, 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 <config.h>

#include "Interval.defs.hh"
#include <iostream>

namespace PPL = Parma_Polyhedra_Library;

/*! \relates Parma_Polyhedra_Library::ERational */
std::ostream&
PPL::IO_Operators::operator<<(std::ostream& s, const ERational& x) {
  if (x.e < 0)
    s << "-infty";
  else if (x.e > 0)
    s << "+infty";
  else
    s << x.v;
  return s;
}

bool
PPL::LBoundary::OK() const {
  if (flag != POS && flag != ZERO) {
#ifndef NDEBUG
    std::cerr << "Invalid flag in LBoundary: " << flag << std::endl;
#endif
    return false;
  }
  return true;
}

bool
PPL::UBoundary::OK() const {
  if (flag != NEG && flag != ZERO) {
#ifndef NDEBUG
    std::cerr << "Invalid flag in UBoundary: " << flag << std::endl;
#endif
    return false;
  }
  return true;
}

bool
PPL::Interval::OK() const {
  return lower.OK() && upper.OK();
}