/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Guido Tack <tack@gecode.org>
 *
 *  Copyright:
 *     Guido Tack, 2006
 *
 *  Last modified:
 *     $Date: 2008-01-29 13:37:51 +0100 (Tue, 29 Jan 2008) $ by $Author: tack $
 *     $Revision: 5993 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

namespace Gecode { namespace Set { namespace Projection {

  forceinline
  CardProjection::CardProjection
  (Space* home, ViewArray<SetView>& x0, Gecode::Int::IntView i0, Projector& p0)
    : Propagator(home), x(x0), i(i0), pc(x.size()), proj(p0) {
    force(home);
    Support::DynamicArray<int> scope;
    for (int i=x0.size(); i--;)
      scope[i] = PC_SET_ANY + 1;
    p0.scope(scope);
    for (int i=x0.size(); i--;) {
      pc[i] = scope[i];
      if (pc[i] != PC_SET_ANY + 1)
        x[i].subscribe(home, this, pc[i]);
    }
  }

  forceinline
  CardProjection::CardProjection
  (Space* home, bool share, CardProjection& p)
    : Propagator(home,share,p), proj(p.proj) {
    x.update(home,share,p.x);
    i.update(home,share,p.i);
    pc.update(home,share, p.pc);
  }

  forceinline PropCost
  CardProjection::cost(ModEventDelta) const {
    switch (x.size()) {
    case 1: return PC_UNARY_HI;
    case 2: return PC_BINARY_HI;
    case 3: return PC_TERNARY_HI;
    default: return PC_LINEAR_HI;
    }
  }

  inline Support::Symbol
  CardProjection::ati(void) {
    return Support::Symbol("set.projectors.CardProjection");
  }

  forceinline Reflection::ActorSpec
  CardProjection::spec(const Space*, Reflection::VarMap&) const {
    throw Reflection::ReflectionException("Not implemented");
  }

  inline size_t
  CardProjection::dispose(Space* home) {
    unforce(home);
    if (!home->failed()) {
      for (int i=x.size(); i--;)
        if (pc[i] != PC_SET_ANY + 1)
          x[i].cancel(home, this, pc[i]);
    }
    proj.~Projector();
    pc.~SharedArray();
    (void) Propagator::dispose(home);
    return sizeof(*this);
  }

  inline ExecStatus
  CardProjection::post(Space* home,
                       ViewArray<SetView>& x, Gecode::Int::IntView i,
                       Projector& p) {
    (void) new (home) CardProjection(home,x,i,p);
    return ES_OK;
  }

  inline Actor*
  CardProjection::copy(Space* home, bool share) {
    return new (home) CardProjection(home,share,*this);
  }

  inline ExecStatus
  CardProjection::propagate(Space* home, ModEventDelta) {
    bool done = true;
    for (int j=x.size(); j--;)
      if (pc[j] != PC_SET_ANY + 1)
        done = done && x[j].assigned();
    
    {
      GECODE_ME_CHECK(i.gq(home, static_cast<int>(proj.glbSize(x))));
      GECODE_ME_CHECK(i.lq(home, static_cast<int>(proj.lubSize(x))));
    }
    return done ? ES_SUBSUMED(this,home) : ES_FIX;
  }

}}}

// STATISTICS: set-prop