Generated on Fri Oct 19 11:25:09 2018 for Gecode by doxygen 1.6.3

int-trace-view.hpp

Go to the documentation of this file.
00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2016
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  *  Permission is hereby granted, free of charge, to any person obtaining
00014  *  a copy of this software and associated documentation files (the
00015  *  "Software"), to deal in the Software without restriction, including
00016  *  without limitation the rights to use, copy, modify, merge, publish,
00017  *  distribute, sublicense, and/or sell copies of the Software, and to
00018  *  permit persons to whom the Software is furnished to do so, subject to
00019  *  the following conditions:
00020  *
00021  *  The above copyright notice and this permission notice shall be
00022  *  included in all copies or substantial portions of the Software.
00023  *
00024  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 namespace Gecode { namespace Int {
00035 
00037   class IntTraceView {
00038   protected:
00040     RangeList* dom;
00041   public:
00043     IntTraceView(void);
00045     IntTraceView(Space& home, IntView y);
00047     RangeList* ranges(void) const;
00049     void prune(Space& home, IntView y, const Delta& d);
00051     void update(Space& home, IntTraceView x);
00053     static unsigned long long int slack(IntView x);
00054   };
00055 
00056   forceinline
00057   IntTraceView::IntTraceView(void) {}
00058 
00059   forceinline
00060   IntTraceView::IntTraceView(Space& home, IntView y) {
00061     ViewRanges<IntView> yr(y);
00062     RangeList::copy(home, dom, yr);
00063   }
00064 
00065   forceinline RangeList*
00066   IntTraceView::ranges(void) const {
00067     return dom;
00068   }
00069 
00070   forceinline void
00071   IntTraceView::prune(Space& home, IntView y, const Delta& d) {
00072     if (y.range() && (dom->next() == NULL)) {
00073       dom->min(y.min()); dom->max(y.max());
00074     } else if (!y.any(d) && (y.max(d)+1 == y.min())) {
00075       // The lower bound has been adjusted
00076       if (y.min() > dom->max()) {
00077         RangeList* p = dom;
00078         RangeList* l = p->next();
00079         while ((l != NULL) && (l->max() < y.min())) {
00080           p=l; l=l->next();
00081         }
00082         dom->dispose(home,p);
00083         dom = l;
00084       }
00085       dom->min(y.min());
00086     } else if (!y.any(d) && (y.max()+1 == y.min(d))) {
00087       // upper bound has been adjusted
00088       if ((y.max() <= dom->max()) && (dom->next() == NULL)) {
00089         dom->max(y.max());
00090       } else {
00091         RangeList* p = dom;
00092         RangeList* l = p->next();
00093         while ((l != NULL) && (l->min() <= y.max())) {
00094           p=l; l=l->next();
00095         }
00096         p->max(y.max());
00097         if (p->next() != NULL)
00098           p->next()->dispose(home);
00099         p->next(NULL);
00100       }
00101     } else {
00102       // Just copy the domain
00103       ViewRanges<IntView> yr(y);
00104       RangeList::overwrite(home,dom,yr);
00105     }
00106   }
00107 
00108   forceinline void
00109   IntTraceView::update(Space& home, IntTraceView y) {
00110     Iter::Ranges::RangeList yr(y.dom);
00111     RangeList::copy(home,dom,yr);
00112   }
00113 
00114   forceinline unsigned long long int
00115   IntTraceView::slack(IntView x) {
00116     return x.width()-1;
00117   }
00118 
00119 
00120 }}
00121 
00122 // STATISTICS: int-trace