/***********************************************************************
 Moses - statistical machine translation system
 Copyright (C) 2006-2011 University of Edinburgh

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 This library 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
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
***********************************************************************/

#include "Span.h"

namespace MosesTraining
{
namespace Syntax
{
namespace GHKM
{

bool SpansIntersect(const Span &a, const ContiguousSpan &b)
{
  for (Span::const_iterator p = a.begin(); p != a.end(); ++p) {
    if (*p >= b.first && *p <= b.second) {
      return true;
    }
  }
  return false;
}

ContiguousSpan Closure(const Span &s)
{
  ContiguousSpan result(-1,-1);
  if (!s.empty()) {
    result.first = *(s.begin());
    result.second = *(s.rbegin());
  }
  return result;
}

}  // namespace GHKM
}  // namespace Syntax
}  // namespace MosesTraining
