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channel.cc

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/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2006
 *
 *  Last modified:
 *     $Date: 2006-08-04 16:03:26 +0200 (Fri, 04 Aug 2006) $ by $Author: schulte $
 *     $Revision: 3512 $
 *
 *  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.
 *
 */

#include "gecode/int/channel.hh"

namespace Gecode {

  using namespace Int;

  void
  channel(Space* home, const IntVarArgs& x, const IntVarArgs& y,
          IntConLevel icl) {
    using namespace Channel;
    int n = x.size();
    if (n != y.size())
      throw ArgumentSizeMismatch("Int::channel");
    if (x.same(y))
      throw ArgumentSame("Int::channel");
    if (home->failed()) return;
    if (n == 0)
      return;

    if (icl == ICL_VAL) {
      ValInfo<IntView>* vi
        = ValInfo<IntView>::allocate(home,2*n);
      for (int i=n; i--; ) {
        vi[i  ].init(x[i],n);
        vi[i+n].init(y[i],n);
      }
      GECODE_ES_FAIL(home,Val<IntView>::post(home,n,vi));
    } else {
      DomInfo<IntView>* di
        = DomInfo<IntView>::allocate(home,2*n);
      for (int i=n; i--; ) {
        di[i  ].init(x[i],n);
        di[i+n].init(y[i],n);
      }
      GECODE_ES_FAIL(home,Dom<IntView>::post(home,n,di));
    }
  }

}

// STATISTICS: int-post