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cached.hpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Guido Tack <tack@gecode.org>
00005  *
00006  *  Contributing authors:
00007  *     Samuel Gagnon <samuel.gagnon92@gmail.com>
00008  *
00009  *  Copyright:
00010  *     Guido Tack, 2011
00011  *     Samuel Gagnon, 2018
00012  *
00013  *  This file is part of Gecode, the generic constraint
00014  *  development environment:
00015  *     http://www.gecode.org
00016  *
00017  *  Permission is hereby granted, free of charge, to any person obtaining
00018  *  a copy of this software and associated documentation files (the
00019  *  "Software"), to deal in the Software without restriction, including
00020  *  without limitation the rights to use, copy, modify, merge, publish,
00021  *  distribute, sublicense, and/or sell copies of the Software, and to
00022  *  permit persons to whom the Software is furnished to do so, subject to
00023  *  the following conditions:
00024  *
00025  *  The above copyright notice and this permission notice shall be
00026  *  included in all copies or substantial portions of the Software.
00027  *
00028  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00029  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00030  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00031  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00032  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00033  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00034  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00035  *
00036  */
00037 
00038 namespace Gecode { namespace Int {
00039 
00040   /*
00041    * Constructors and initialization
00042    *
00043    */
00044   template<class View>
00045   forceinline
00046   CachedView<View>::CachedView(void) : _size(0) {}
00047   template<class View>
00048   forceinline
00049   CachedView<View>::CachedView(const View& y)
00050     : DerivedView<View>(y), _firstRange(NULL), _lastRange(NULL),
00051       _size(0) {}
00052 
00053 
00054   /*
00055    * Value access
00056    *
00057    */
00058   template<class View>
00059   forceinline int
00060   CachedView<View>::min(void) const {
00061     return x.min();
00062   }
00063   template<class View>
00064   forceinline int
00065   CachedView<View>::max(void) const {
00066     return x.max();
00067   }
00068   template<class View>
00069   forceinline int
00070   CachedView<View>::med(void) const {
00071     return x.med();
00072   }
00073   template<class View>
00074   forceinline int
00075   CachedView<View>::val(void) const {
00076     return x.val();
00077   }
00078 #ifdef GECODE_HAS_CBS
00079   template<class View>
00080   forceinline int
00081   CachedView<View>::baseval(int val) const {
00082     return val;
00083   }
00084 #endif
00085 
00086   template<class View>
00087   forceinline unsigned int
00088   CachedView<View>::width(void) const {
00089     return x.width();
00090   }
00091   template<class View>
00092   forceinline unsigned int
00093   CachedView<View>::size(void) const {
00094     return x.size();
00095   }
00096   template<class View>
00097   forceinline unsigned int
00098   CachedView<View>::regret_min(void) const {
00099     return x.regret_min();
00100   }
00101   template<class View>
00102   forceinline unsigned int
00103   CachedView<View>::regret_max(void) const {
00104     return x.regret_max();
00105   }
00106 
00107   /*
00108    * Domain tests
00109    *
00110    */
00111   template<class View>
00112   forceinline bool
00113   CachedView<View>::range(void) const {
00114     return x.range();
00115   }
00116   template<class View>
00117   forceinline bool
00118   CachedView<View>::in(int n) const {
00119     return x.in(n);
00120   }
00121   template<class View>
00122   forceinline bool
00123   CachedView<View>::in(long long int n) const {
00124     return x.in(n);
00125   }
00126 
00127 
00128   /*
00129    * Domain update by value
00130    *
00131    */
00132   template<class View>
00133   forceinline ModEvent
00134   CachedView<View>::lq(Space& home, int n) {
00135     return x.lq(home,n);
00136   }
00137   template<class View>
00138   forceinline ModEvent
00139   CachedView<View>::lq(Space& home, long long int n) {
00140     return x.lq(home,n);
00141   }
00142   template<class View>
00143   forceinline ModEvent
00144   CachedView<View>::le(Space& home, int n) {
00145     return x.le(home,n);
00146   }
00147   template<class View>
00148   forceinline ModEvent
00149   CachedView<View>::le(Space& home, long long int n) {
00150     return x.le(home,n);
00151   }
00152   template<class View>
00153   forceinline ModEvent
00154   CachedView<View>::gq(Space& home, int n) {
00155     return x.gq(home,n);
00156   }
00157   template<class View>
00158   forceinline ModEvent
00159   CachedView<View>::gq(Space& home, long long int n) {
00160     return x.gq(home,n);
00161   }
00162   template<class View>
00163   forceinline ModEvent
00164   CachedView<View>::gr(Space& home, int n) {
00165     return x.gr(home,n);
00166   }
00167   template<class View>
00168   forceinline ModEvent
00169   CachedView<View>::gr(Space& home, long long int n) {
00170     return x.gr(home,n);
00171   }
00172   template<class View>
00173   forceinline ModEvent
00174   CachedView<View>::nq(Space& home, int n) {
00175     return x.nq(home,n);
00176   }
00177   template<class View>
00178   forceinline ModEvent
00179   CachedView<View>::nq(Space& home, long long int n) {
00180     return x.nq(home,n);
00181   }
00182   template<class View>
00183   forceinline ModEvent
00184   CachedView<View>::eq(Space& home, int n) {
00185     return x.eq(home,n);
00186   }
00187   template<class View>
00188   forceinline ModEvent
00189   CachedView<View>::eq(Space& home, long long int n) {
00190     return x.eq(home,n);
00191   }
00192 
00193 
00194   /*
00195    * Iterator-based domain update
00196    *
00197    */
00198   template<class View>
00199   template<class I>
00200   forceinline ModEvent
00201   CachedView<View>::narrow_r(Space& home, I& i, bool depend) {
00202     return x.narrow_r(home,i,depend);
00203   }
00204   template<class View>
00205   template<class I>
00206   forceinline ModEvent
00207   CachedView<View>::inter_r(Space& home, I& i, bool depend) {
00208     return x.inter_r(home,i,depend);
00209   }
00210   template<class View>
00211   template<class I>
00212   forceinline ModEvent
00213   CachedView<View>::minus_r(Space& home, I& i, bool depend) {
00214     return x.minus_r(home,i,depend);
00215   }
00216   template<class View>
00217   template<class I>
00218   forceinline ModEvent
00219   CachedView<View>::narrow_v(Space& home, I& i, bool depend) {
00220     return x.narrow_v(home,i,depend);
00221   }
00222   template<class View>
00223   template<class I>
00224   forceinline ModEvent
00225   CachedView<View>::inter_v(Space& home, I& i, bool depend) {
00226     return x.inter_v(home,i,depend);
00227   }
00228   template<class View>
00229   template<class I>
00230   forceinline ModEvent
00231   CachedView<View>::minus_v(Space& home, I& i, bool depend) {
00232     return x.minus_v(home,i,depend);
00233   }
00234 
00235 
00236 
00237   /*
00238    * Propagator modification events
00239    *
00240    */
00241   template<class View>
00242   forceinline ModEventDelta
00243   CachedView<View>::med(ModEvent me) {
00244     return View::med(me);
00245   }
00246 
00247 
00248   /*
00249    * Delta information for advisors
00250    *
00251    */
00252   template<class View>
00253   forceinline int
00254   CachedView<View>::min(const Delta& d) const {
00255     return x.min(d);
00256   }
00257   template<class View>
00258   forceinline int
00259   CachedView<View>::max(const Delta& d) const {
00260     return x.max(d);
00261   }
00262   template<class View>
00263   forceinline unsigned int
00264   CachedView<View>::width(const Delta& d) const {
00265     return x.width(d);
00266   }
00267   template<class View>
00268   forceinline bool
00269   CachedView<View>::any(const Delta& d) const {
00270     return x.any(d);
00271   }
00272 
00273 
00274 
00275   /*
00276    * Cloning
00277    *
00278    */
00279   template<class View>
00280   void
00281   CachedView<View>::update(Space& home, CachedView<View>& y) {
00282     DerivedView<View>::update(home,y);
00283     if (y._firstRange) {
00284       _firstRange = new (home) RangeList(y._firstRange->min(),
00285                                          y._firstRange->max(),NULL);
00286       RangeList* cur = _firstRange;
00287 
00288       for (RangeList* y_cur = y._firstRange->next(); y_cur != NULL;
00289            y_cur = y_cur->next()) {
00290         RangeList* next =
00291           new (home) RangeList(y_cur->min(),y_cur->max(),NULL);
00292         cur->next(next);
00293         cur = next;
00294       }
00295       _lastRange = cur;
00296       _size = y._size;
00297     }
00298   }
00299 
00300 
00301   /*
00302    * Cache operations
00303    *
00304    */
00305   template<class View>
00306   void
00307   CachedView<View>::initCache(Space& home, const IntSet& s) {
00308     _firstRange = NULL;
00309     for (int i=s.ranges(); i--;) {
00310       _firstRange = new (home) RangeList(s.min(i),s.max(i),_firstRange);
00311       if (i==s.ranges()-1)
00312         _lastRange = _firstRange;
00313     }
00314     _size = s.size();
00315   }
00316 
00317   template<class View>
00318   void
00319   CachedView<View>::cache(Space& home) {
00320     _firstRange->dispose(home,_lastRange);
00321     ViewRanges<View> xr(x);
00322     _firstRange = new (home) RangeList(xr.min(),xr.max(),NULL);
00323     ++xr;
00324     RangeList* cur = _firstRange;
00325     for (; xr(); ++xr) {
00326       RangeList* next = new (home) RangeList(xr.min(),xr.max(),NULL);
00327       cur->next(next);
00328       cur = next;
00329     }
00330     _lastRange = cur;
00331     _size = x.size();
00332   }
00333 
00334   template<class View>
00335   forceinline bool
00336   CachedView<View>::modified(void) const {
00337     return x.size() != _size;
00338   }
00339 
00340 
00345   template<class View>
00346   class ViewRanges<CachedView<View> >
00347     : public ViewRanges<View> {
00348   public:
00350 
00351 
00352     ViewRanges(void);
00354     ViewRanges(const CachedView<View>& x);
00356     void init(const CachedView<View>& x);
00358   };
00359 
00360   template<class View>
00361   forceinline
00362   ViewRanges<CachedView<View> >::ViewRanges(void) {}
00363 
00364   template<class View>
00365   forceinline
00366   ViewRanges<CachedView<View> >::ViewRanges(const CachedView<View>& x) {
00367     ViewRanges<IntView>::init(x.base());
00368   }
00369 
00370   template<class View>
00371   forceinline void
00372   ViewRanges<CachedView<View> >::init(const CachedView<View>& x) {
00373     ViewRanges<View>::init(x.base());
00374   }
00375 
00376   template<class View>
00377   forceinline
00378   ViewDiffRanges<View>::ViewDiffRanges(void) {}
00379 
00380   template<class View>
00381   forceinline
00382   ViewDiffRanges<View>::ViewDiffRanges(const CachedView<View>& x)
00383     : cr(x._firstRange), dr(x.base()) {
00384     Super::init(cr,dr);
00385   }
00386 
00387   template<class View>
00388   forceinline void
00389   ViewDiffRanges<View>::init(const CachedView<View>& x) {
00390     cr.init(x._firstRange);
00391     dr.init(x.base());
00392     Super::init(cr,dr);
00393   }
00394 
00395   /*
00396    * View comparison
00397    *
00398    */
00399   template<class View>
00400   forceinline bool
00401   operator ==(const CachedView<View>& x, const CachedView<View>& y) {
00402     return (x.base() == y.base()) && (x.offset() == y.offset());
00403   }
00404   template<class View>
00405   forceinline bool
00406   operator !=(const CachedView<View>& x, const CachedView<View>& y) {
00407     return !(x == y);
00408   }
00409 
00410 }}
00411 
00412 // STATISTICS: int-var
00413