RhodeCode

    ///@{

    /// \brief Checks if a node is reached from the root(s).

    ///

    /// Returns \c true if \c v is reached from the root(s).

    ///

    /// \pre Either \ref run(Node) "run()" or \ref init()

    /// must be called before using this function.

    ///@}

  };

} //END OF NAMESPACE LEMON

#endif

    }

    /// \brief Returns a const reference to the elevator.

    ///

    /// Returns a const reference to the elevator.

    ///

    /// \pre Either \ref run() or \ref init() must be called before

    /// using this function.

      return *_level;

    }

    /// \brief Sets the tolerance used by algorithm.

    ///

    /// Sets the tolerance used by algorithm.

    Circulation& tolerance(const Tolerance& tolerance) const {

      _tol = tolerance;

    }

    /// \brief Returns a const reference to the flow map.

    ///

    /// Returns a const reference to the arc map storing the found flow.

    ///

    /// \pre Either \ref run() or \ref init() must be called before

    /// using this function.

      return *_flow;

    }

    /**

       \brief Returns \c true if the given node is in a barrier.

       Barrier is a set \e B of nodes for which

       gives back \c false for every node.

       \pre Either \ref run() or \ref init() must be called before

       using this function.

       \sa barrierMap()

       \sa checkBarrier()

    */

    {

      return (*_level)[node] >= _el;

    }

    /// \brief Gives back a barrier.

    ///

    /// This function sets \c bar to the characteristic vector of the

    /// found barrier. \c bar should be a \ref concepts::WriteMap "writable"

    /// so it runs in \f$O(n)\f$ time.

    ///

    /// \pre Either \ref run() or \ref init() must be called before

    /// using this function.

    ///

    /// \sa barrier()

    /// \sa checkBarrier()

    template<class BarrierMap>

    {

      for(NodeIt n(_g);n!=INVALID;++n)

        bar.set(n, (*_level)[n] >= _el);

    }

    /// @}

    /// \name Checker Functions

    /// using them.

    ///@{

    ///Check if the found flow is a feasible circulation

    ///Check if the found flow is a feasible circulation,

    ///

      for(ArcIt e(_g);e!=INVALID;++e)

        if((*_flow)[e]<(*_lo)[e]||(*_flow)[e]>(*_up)[e]) return false;

      for(NodeIt n(_g);n!=INVALID;++n)

        {

          Value dif=-(*_delta)[n];

          for(InArcIt e(_g,n);e!=INVALID;++e) dif-=(*_flow)[e];

          for(OutArcIt e(_g,n);e!=INVALID;++e) dif+=(*_flow)[e];

          if(_tol.negative(dif)) return false;

      return true;

    }

    ///Check whether or not the last execution provides a barrier

    ///Check whether or not the last execution provides a barrier.

    ///\sa barrier()

    ///\sa barrierMap()

    {

      Value delta=0;

      for(NodeIt n(_g);n!=INVALID;++n)

        if(barrier(n))

          delta-=(*_delta)[n];

      for(ArcIt e(_g);e!=INVALID;++e)

        {

          Node s=_g.source(e);

    ///@{

    /// \brief Checks if a node is reached from the root(s).

    ///

    /// Returns \c true if \c v is reached from the root(s).

    ///

    /// \pre Either \ref run(Node) "run()" or \ref init()

    /// must be called before using this function.

    ///@}

  };

} //END OF NAMESPACE LEMON

#endif

    }

    /// \brief Returns a const reference to the elevator.

    ///

    /// Returns a const reference to the elevator.

    ///

    /// \pre Either \ref run() or \ref init() must be called before

    /// using this function.

      return *_level;

    }

    /// \brief Sets the tolerance used by algorithm.

    ///

    /// Sets the tolerance used by algorithm.

    Preflow& tolerance(const Tolerance& tolerance) const {

      _tolerance = tolerance;

    /// \brief Returns a const reference to the flow map.

    ///

    /// Returns a const reference to the arc map storing the found flow.

    /// This method can be called after the second phase of the algorithm.

    ///

    /// \pre Either \ref run() or \ref init() must be called before

    /// using this function.

      return *_flow;

    }

    /// \brief Returns \c true when the node is on the source side of the

    /// minimum cut.

    ///

    /// Returns true when the node is on the source side of the found

    /// minimum cut. This method can be called both after running \ref