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channel.cc

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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, 2006
00008  *
00009  *  Last modified:
00010  *     $Date: 2008-02-25 00:16:01 +0100 (Mon, 25 Feb 2008) $ by $Author: schulte $
00011  *     $Revision: 6288 $
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 #include "gecode/int/channel.hh"
00039 
00040 namespace Gecode {
00041 
00042   void
00043   channel(Space* home, const IntVarArgs& x, const IntVarArgs& y,
00044           IntConLevel icl, PropKind) {
00045     using namespace Int;
00046     using namespace Channel;
00047     int n = x.size();
00048     if (n != y.size())
00049       throw ArgumentSizeMismatch("Int::channel");
00050     if (x.same() || y.same())
00051       throw ArgumentSame("Int::channel");
00052     if (home->failed()) return;
00053     if (n == 0)
00054       return;
00055 
00056     if (icl == ICL_DOM) {
00057       DomInfo<IntView>* di
00058         = DomInfo<IntView>::allocate(home,2*n);
00059       for (int i=n; i--; ) {
00060         di[i  ].init(x[i],n);
00061         di[i+n].init(y[i],n);
00062       }
00063       if (x.same(y)) {
00064         GECODE_ES_FAIL(home,(Dom<IntView,true>::post(home,n,di)));
00065       } else {
00066         GECODE_ES_FAIL(home,(Dom<IntView,false>::post(home,n,di)));
00067       }
00068     } else {
00069       ValInfo<IntView>* vi
00070         = ValInfo<IntView>::allocate(home,2*n);
00071       for (int i=n; i--; ) {
00072         vi[i  ].init(x[i],n);
00073         vi[i+n].init(y[i],n);
00074       }
00075       if (x.same(y)) {
00076         GECODE_ES_FAIL(home,(Val<IntView,true>::post(home,n,vi)));
00077       } else {
00078         GECODE_ES_FAIL(home,(Val<IntView,false>::post(home,n,vi)));
00079       }
00080     }
00081   }
00082 
00083   void
00084   channel(Space* home, BoolVar x0, IntVar x1, IntConLevel, PropKind) {
00085     using namespace Int;
00086     if (home->failed()) return;
00087     GECODE_ES_FAIL(home,Channel::LinkSingle::post(home,x0,x1));
00088   }
00089 
00090   void
00091   channel(Space* home, const BoolVarArgs& x, IntVar y, int o, 
00092           IntConLevel, PropKind) {
00093     using namespace Int;
00094     if (x.same())
00095       throw ArgumentSame("Int::channel");
00096     Limits::check(o,"Int::channel");
00097     if (home->failed()) return;
00098     ViewArray<BoolView> xv(home,x);
00099     GECODE_ES_FAIL(home,Channel::LinkMulti::post(home,xv,y,o));
00100   }
00101 
00102   namespace {
00103     using namespace Int;
00104     GECODE_REGISTER2(Channel::Dom<IntView, false>);
00105     GECODE_REGISTER2(Channel::Dom<IntView, true>);
00106     GECODE_REGISTER2(Channel::Val<IntView, false>);
00107     GECODE_REGISTER2(Channel::Val<IntView, true>);
00108     GECODE_REGISTER1(Channel::LinkSingle);
00109     GECODE_REGISTER1(Channel::LinkMulti);
00110   }
00111 
00112 }
00113 
00114 // STATISTICS: int-post