select-val.icc

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Guido Tack <tack@gecode.org>
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Contributing authors:
 *     Gabor Szokoli <szokoli@gecode.org>
 *
 *  Copyright:
 *     Guido Tack, 2004
 *     Christian Schulte, 2004
 *     Gabor Szokoli, 2004
 *
 *  Last modified:
 *     $Date: 2008-02-16 10:42:26 +0100 (Sat, 16 Feb 2008) $ by $Author: tack $
 *     $Revision: 6185 $
 *
 *  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 Branch {

  forceinline int
  ValMin::val(const Space*, SetView x) const {
    UnknownRanges<SetView> unknown(x);
    return unknown.min();
  }
  forceinline ModEvent
  ValMin::tell(Space* home, unsigned int a, SetView x, int v) {
    return (a == 0) ? x.include(home,v) : x.exclude(home,v);
  }
  inline Support::Symbol
  ValMin::type(void) {
    return Support::Symbol("Gecode::Set::Branch::ValMin");
  }
  forceinline void
  ValMin::branchingSpec(const Space* home,
                        Reflection::VarMap& m, Reflection::BranchingSpec& bs,
                        int alt, SetView x, int n) const {
    assert(alt <= 2);
    Reflection::ArrayArg* a0 = Reflection::Arg::newArray(2);
    std::stringstream s;
    s << n;
    (*a0)[0] = Reflection::Arg::newString((s.str()+" in ").c_str());
    (*a0)[1] = x.spec(home, m);
    bs[0] = a0;
    if (alt == 2) {
      Reflection::ArrayArg* a1 = Reflection::Arg::newArray(2);
      (*a1)[0] = Reflection::Arg::newString((s.str()+" not in ").c_str());
      (*a1)[1] = x.spec(home, m);
      bs[1] = a1;
    }
  }

  forceinline int
  ValMax::val(const Space*, SetView x) const {
    int maxElem = 0;
    UnknownRanges<SetView> unknown(x);
    while (unknown()) {
      maxElem = unknown.max();
      ++unknown;
    }
    return maxElem;
  }
  forceinline ModEvent
  ValMax::tell(Space* home, unsigned int a, SetView x, int v) {
    return (a == 0) ? x.include(home,v) : x.exclude(home,v);
  }
  inline Support::Symbol
  ValMax::type(void) {
    return Support::Symbol("Gecode::Set::Branch::ValMax");
  }
  forceinline void
  ValMax::branchingSpec(const Space* home,
                        Reflection::VarMap& m, Reflection::BranchingSpec& bs,
                        int alt, SetView x, int n) const {
    assert(alt <= 2);
    Reflection::ArrayArg* a0 = Reflection::Arg::newArray(2);
    std::stringstream s;
    s << n;
    (*a0)[0] = Reflection::Arg::newString((s.str()+" in ").c_str());
    (*a0)[1] = x.spec(home, m);
    bs[0] = a0;
    if (alt == 2) {
      Reflection::ArrayArg* a1 = Reflection::Arg::newArray(2);
      (*a1)[0] = Reflection::Arg::newString((s.str()+" not in ").c_str());
      (*a1)[1] = x.spec(home, m);
      bs[1] = a1;
    }
  }

  template <class SelView>
  static void
  create(Space* home, ViewArray<SetView>& x, SetValBranch vals) {
    switch (vals) {
    case SET_VAL_MIN:
      (void) new (home) ViewValBranching<SetView,int,SelView,ValMin>(home,x);
      break;
    case SET_VAL_MAX:
      (void) new (home) ViewValBranching<SetView,int,SelView,ValMax>(home,x);
      break;
    default:
      throw UnknownBranching("Set::branch");
    }
  }

}}}

// STATISTICS: set-branch