/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2004
 *
 *  Last modified:
 *     $Date: 2006-07-19 14:57:38 +0200 (Wed, 19 Jul 2006) $ by $Author: schulte $
 *     $Revision: 3413 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  See the file "LICENSE" for information on usage and
 *  redistribution of this file, and for a
 *     DISCLAIMER OF ALL WARRANTIES.
 *
 */

namespace Gecode { namespace Int { namespace Dom {

  template <class View>
  forceinline
  ReIntSet<View>::ReIntSet
  (Space* home, View x, const IntSet& s, BoolView b)
    : ReUnaryPropagator<View,PC_INT_DOM,BoolView>(home,x,b,true), is(s) {}

  template <class View>
  ExecStatus
  ReIntSet<View>::post(Space* home, View x, const IntSet& s, BoolView b) {
    if (s.size() == 0) {
      GECODE_ME_CHECK(b.t_zero(home));
    } else if (s.size() == 1) {
      return ReRange<View>::post(home,x,s.min(),s.max(),b);
    } else {
      (void) new (home) ReIntSet<View>(home,x,s,b);
    }
    return ES_OK;
  }


  template <class View>
  forceinline
  ReIntSet<View>::ReIntSet(Space* home, bool share, ReIntSet& p)
    : ReUnaryPropagator<View,PC_INT_DOM,BoolView>(home,share,p) {
    is.update(share,p.is);
  }

  template <class View>
  Actor*
  ReIntSet<View>::copy(Space* home, bool share) {
    return new (home) ReIntSet(home,share,*this);
  }

  template <class View>
  ExecStatus
  ReIntSet<View>::propagate(Space* home) {
    IntSetRanges i_is(is);
    if (b.one()) {
      GECODE_ME_CHECK(x0.inter(home,i_is)); return ES_SUBSUMED;
    }
    if (b.zero()) {
      GECODE_ME_CHECK(x0.minus(home,i_is)); return ES_SUBSUMED;
    }

    ViewRanges<View> i_x(x0);

    switch (Iter::Ranges::subsumes(i_is,i_x)) {
    case Iter::Ranges::SS_SUBSUMED:
      b.t_one_none(home); return ES_SUBSUMED;
    case Iter::Ranges::SS_EMPTY:
      b.t_zero_none(home); return ES_SUBSUMED;
    case Iter::Ranges::SS_NONE:
      break;
    default: GECODE_NEVER;
    }
    return ES_FIX;
  }

}}}

// STATISTICS: int-prop