Jip J. Dekker
3e72b0e857
git-subtree-dir: software/gecode_on_record git-subtree-split: 37ed9bda495ea87e63217c19a374b5a93bb0078e
414 lines
14 KiB
C++
414 lines
14 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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* Guido Tack <tack@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2002
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* Guido Tack, 2004
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef GECODE_INT_COUNT_HH
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#define GECODE_INT_COUNT_HH
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#include <gecode/int.hh>
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/**
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* \namespace Gecode::Int::Count
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* \brief Counting propagators
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*/
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namespace Gecode { namespace Int { namespace Count {
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/**
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* Relations for domain consistent counting
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*
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*/
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//@{
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/// Return whether \a y is an integer set
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template<class VY>
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bool isintset(VY y);
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/// Return whether \a y is a value
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template<class VY>
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bool isval(VY y);
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/// Subscribe propagator \a p to view \a y
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template<class VY>
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void subscribe(Space& home, Propagator& p, VY y);
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/// Cancel propagator \a p for view \a y
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template<class VY>
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void cancel(Space& home, Propagator& p, VY y);
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/// Schedule propagator \a p for view \a y
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template<class VY>
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void reschedule(Space& home, Propagator& p, VY y);
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/// Update view \a y from \a py
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template<class VY>
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void update(VY& y, Space& home, bool shared, VY py);
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/// Test whether \a x and \a y are equal
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template<class VX>
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RelTest holds(VX x, VX y);
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/// Test whether \a x and \a y are equal
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template<class VX>
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RelTest holds(VX x, ConstIntView y);
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/// Test whether \a x and \a y are equal
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template<class VX>
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RelTest holds(VX x, ZeroIntView y);
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/// Test whether \a x and \a y are equal
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template<class VX>
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RelTest holds(VX x, const IntSet& y);
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/// Post that all views in \a x are equal to \a y
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template<class VX>
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ExecStatus post_true(Home home, ViewArray<VX>& x, VX y);
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/// Post that all views in \a x are equal to \a y
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template<class VX>
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ExecStatus post_true(Home home, ViewArray<VX>& x, ConstIntView y);
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/// Post that all views in \a x are equal to \a y
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template<class VX>
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ExecStatus post_true(Home home, ViewArray<VX>& x, ZeroIntView y);
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/// Post that all views in \a x are equal to \a y
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template<class VX>
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ExecStatus post_true(Home home, ViewArray<VX>& x, const IntSet& y);
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/// Post that all views in \a x are not equal to \a y
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template<class VX>
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ExecStatus post_false(Home home, ViewArray<VX>& x, VX y);
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/// Post that all views in \a x are not equal to \a y
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template<class VX>
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ExecStatus post_false(Home home, ViewArray<VX>& x, ConstIntView y);
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/// Post that all views in \a x are not equal to \a y
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template<class VX>
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ExecStatus post_false(Home home, ViewArray<VX>& x, ZeroIntView y);
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/// Post that all views in \a x are not equal to \a y
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template<class VX>
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ExecStatus post_false(Home home, ViewArray<VX>& x, const IntSet& y);
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/// Prune that \a y is the union of \a x
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template<class VX>
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ExecStatus prune(Home home, ViewArray<VX>& x, VX y);
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/// Prune that \a y is the union of \a x
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template<class VX>
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ExecStatus prune(Home home, ViewArray<VX>& x, ConstIntView y);
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/// Prune that \a y is the union of \a x
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template<class VX>
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ExecStatus prune(Home home, ViewArray<VX>& x, ZeroIntView y);
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/// Prune that \a y is the union of \a x
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template<class VX>
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ExecStatus prune(Home home, ViewArray<VX>& x, const IntSet& y);
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//@}
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}}}
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#include <gecode/int/count/rel.hpp>
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namespace Gecode { namespace Int { namespace Count {
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/**
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* \brief Baseclass for count propagators (integer)
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*
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*/
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template<class VX, class VY>
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class IntBase : public Propagator {
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protected:
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/// Views still to count
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ViewArray<VX> x;
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/// Views from x[0] ... x[n_s-1] have subscriptions
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int n_s;
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/// View to compare to
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VY y;
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/// Number of views which are equal and have been eliminated
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int c;
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/// Constructor for cloning \a p
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IntBase(Space& home, IntBase& p);
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/// Constructor for creation
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IntBase(Home home, ViewArray<VX>& x, int n_s, VY y, int c);
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public:
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/// Cost function (defined as low linear)
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virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
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/// Schedule function
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virtual void reschedule(Space& home);
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/// Delete propagator and return its size
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virtual size_t dispose(Space& home);
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};
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/**
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* \brief %Propagator for counting views (equal integer to number of equal views)
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*
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* Not all combinations of views are possible. The types \a VX
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* and \a VY must be either equal, or \a VY must be ConstIntView,
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* ZeroIntView, or IntSet.
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*
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* Requires \code #include <gecode/int/count.hh> \endcode
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* \ingroup FuncIntProp
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*/
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template<class VX, class VY>
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class EqInt : public IntBase<VX,VY> {
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protected:
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using IntBase<VX,VY>::x;
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using IntBase<VX,VY>::n_s;
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using IntBase<VX,VY>::y;
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using IntBase<VX,VY>::c;
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/// Constructor for cloning \a p
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EqInt(Space& home, EqInt& p);
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/// Constructor for creation
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EqInt(Home home, ViewArray<VX>& x, int n_s, VY y, int c);
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public:
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/// Create copy during cloning
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virtual Actor* copy(Space& home);
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/// Perform propagation
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virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
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/// Post propagator for \f$\#\{i\in\{0,\ldots,|x|-1\}\;|\;x_i=y\}=c\f$
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static ExecStatus post(Home home, ViewArray<VX>& x, VY y, int c);
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};
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/**
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* \brief %Propagator for counting views (greater or equal integer to number of equal views)
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*
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* Not all combinations of views are possible. The types \a VX
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* and \a VY must be either equal, or \a VY must be ConstIntView,
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* ZeroIntView, or IntSet.
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*
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* Requires \code #include <gecode/int/count.hh> \endcode
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* \ingroup FuncIntProp
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*/
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template<class VX, class VY>
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class GqInt : public IntBase<VX,VY> {
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protected:
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using IntBase<VX,VY>::x;
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using IntBase<VX,VY>::n_s;
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using IntBase<VX,VY>::y;
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using IntBase<VX,VY>::c;
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/// Constructor for cloning \a p
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GqInt(Space& home, GqInt& p);
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/// Constructor for creation
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GqInt(Home home, ViewArray<VX>& x, int n_s, VY y, int c);
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public:
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/// Create copy during cloning
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virtual Actor* copy(Space& home);
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/// Perform propagation
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virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
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/// Post propagator for \f$\#\{i\in\{0,\ldots,|x|-1\}\;|\;x_i=y\}\geq c\f$
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static ExecStatus post(Home home, ViewArray<VX>& x, VY y, int c);
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};
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/**
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* \brief %Propagator for counting views (less or equal integer to number of equal views)
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*
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* Not all combinations of views are possible. The types \a VX
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* and \a VY must be either equal, or \a VY must be ConstIntView,
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* ZeroIntView, or IntSet.
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*
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* Requires \code #include <gecode/int/count.hh> \endcode
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* \ingroup FuncIntProp
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*/
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template<class VX, class VY>
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class LqInt : public IntBase<VX,VY> {
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protected:
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using IntBase<VX,VY>::x;
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using IntBase<VX,VY>::n_s;
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using IntBase<VX,VY>::y;
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using IntBase<VX,VY>::c;
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/// Constructor for cloning \a p
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LqInt(Space& home, LqInt& p);
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/// Constructor for creation
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LqInt(Home home, ViewArray<VX>& x, int n_s, VY y, int c);
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public:
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/// Create copy during cloning
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virtual Actor* copy(Space& home);
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/// Perform propagation
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virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
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/// Post propagator for \f$\#\{i\in\{0,\ldots,|x|-1\}\;|\;x_i=y\}\leq c\f$
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static ExecStatus post(Home home, ViewArray<VX>& x, VY y, int c);
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};
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}}}
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#include <gecode/int/count/int-base.hpp>
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#include <gecode/int/count/int-eq.hpp>
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#include <gecode/int/count/int-gq.hpp>
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#include <gecode/int/count/int-lq.hpp>
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namespace Gecode { namespace Int { namespace Count {
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/**
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* \brief Base-class for count propagators (view)
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*
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*/
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template<class VX, class VY, class VZ>
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class ViewBase : public Propagator {
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protected:
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/// Views still to count
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ViewArray<VX> x;
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/// View to compare to
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VY y;
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/// View which yields result of counting
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VZ z;
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/// Number of views which are equal and have been eliminated
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int c;
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/// Constructor for cloning \a p
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ViewBase(Space& home, ViewBase& p);
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/// Constructor for creation
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ViewBase(Home home, ViewArray<VX>& x, VY y, VZ z, int c);
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public:
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/// Delete propagator and return its size
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virtual size_t dispose(Space& home);
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/// Cost function (defined as low linear)
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virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
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/// Schedule function
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virtual void reschedule(Space& home);
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protected:
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/// Count how many views are equal now
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void count(Space& home);
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/// How many views are at least equal
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int atleast(void) const;
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/// How many views are at most equal
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int atmost(void) const;
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/// Test whether there is sharing of \a z with \a x or \a y
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static bool sharing(const ViewArray<VX>& x, const VY& y, const VZ& z);
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};
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/**
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* \brief %Propagator for counting views (equal to number of equal views)
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*
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* Not all combinations of views are possible. The types \a VX
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* and \a VY must be either equal, or \a VY must be ConstIntView,
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* ZeroIntView, or IntSet.
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*
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* Requires \code #include <gecode/int/count.hh> \endcode
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* \ingroup FuncIntProp
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*/
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template<class VX, class VY, class VZ, bool shr, bool dom>
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class EqView : public ViewBase<VX,VY,VZ> {
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protected:
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using ViewBase<VX,VY,VZ>::x;
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using ViewBase<VX,VY,VZ>::z;
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using ViewBase<VX,VY,VZ>::c;
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using ViewBase<VX,VY,VZ>::y;
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using ViewBase<VX,VY,VZ>::count;
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using ViewBase<VX,VY,VZ>::atleast;
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using ViewBase<VX,VY,VZ>::atmost;
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using ViewBase<VX,VY,VZ>::sharing;
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/// Constructor for cloning \a p
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EqView(Space& home, EqView& p);
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public:
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/// Constructor for creation
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EqView(Home home, ViewArray<VX>& x, VY y, VZ z, int c);
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/// Create copy during cloning
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virtual Actor* copy(Space& home);
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/// Perform propagation
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virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
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/// Post propagator for \f$\#\{i\in\{0,\ldots,|x|-1\}\;|\;x_i=y\}=z+c\f$
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static ExecStatus post(Home home, ViewArray<VX>& x, VY y, VZ z, int c);
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};
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/**
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* \brief %Propagator for counting views (less or equal to number of equal views)
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*
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* Not all combinations of views are possible. The types \a VX
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* and \a VY must be either equal, or \a VY must be ConstIntView,
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* ZeroIntView, or IntSet.
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*
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* Requires \code #include <gecode/int/count.hh> \endcode
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* \ingroup FuncIntProp
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*/
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template<class VX, class VY, class VZ, bool shr>
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class LqView : public ViewBase<VX,VY,VZ> {
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protected:
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using ViewBase<VX,VY,VZ>::x;
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using ViewBase<VX,VY,VZ>::z;
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using ViewBase<VX,VY,VZ>::c;
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using ViewBase<VX,VY,VZ>::y;
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using ViewBase<VX,VY,VZ>::count;
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using ViewBase<VX,VY,VZ>::atleast;
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using ViewBase<VX,VY,VZ>::atmost;
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using ViewBase<VX,VY,VZ>::sharing;
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/// Constructor for cloning \a p
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LqView(Space& home, LqView& p);
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public:
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/// Constructor for creation
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LqView(Home home, ViewArray<VX>& x, VY y, VZ z, int c);
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/// Create copy during cloning
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virtual Actor* copy(Space& home);
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/// Perform propagation
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virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
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/// Post propagator for \f$\#\{i\in\{0,\ldots,|x|-1\}\;|\;x_i=y\}\leq z+c\f$
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static ExecStatus post(Home home, ViewArray<VX>& x, VY y, VZ z, int c);
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};
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/**
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* \brief %Propagator for counting views (greater or equal to number of equal views)
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*
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* Not all combinations of views are possible. The types \a VX
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* and \a VY must be either equal, or \a VY must be ConstIntView,
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* ZeroIntView, or IntSet.
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*
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* Requires \code #include <gecode/int/count.hh> \endcode
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* \ingroup FuncIntProp
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*/
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template<class VX, class VY, class VZ, bool shr, bool dom>
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class GqView : public ViewBase<VX,VY,VZ> {
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protected:
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using ViewBase<VX,VY,VZ>::x;
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using ViewBase<VX,VY,VZ>::z;
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using ViewBase<VX,VY,VZ>::c;
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using ViewBase<VX,VY,VZ>::y;
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using ViewBase<VX,VY,VZ>::count;
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using ViewBase<VX,VY,VZ>::atleast;
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using ViewBase<VX,VY,VZ>::atmost;
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using ViewBase<VX,VY,VZ>::sharing;
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/// Constructor for cloning \a p
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GqView(Space& home, GqView& p);
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public:
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/// Constructor for creation
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GqView(Home home, ViewArray<VX>& x, VY y, VZ z, int c);
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/// Create copy during cloning
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virtual Actor* copy(Space& home);
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/// Perform propagation
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virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
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/// Post propagator for \f$\#\{i\in\{0,\ldots,|x|-1\}\;|\;x_i=y\}\geq z+c\f$
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static ExecStatus post(Home home, ViewArray<VX>& x, VY y, VZ z, int c);
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};
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}}}
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#include <gecode/int/count/view-base.hpp>
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#include <gecode/int/count/view-eq.hpp>
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#include <gecode/int/count/view-gq.hpp>
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#include <gecode/int/count/view-lq.hpp>
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#endif
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// STATISTICS: int-prop
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