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sym-bit-matrix.hpp

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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, 2011
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 #include <algorithm>
00035 
00036 namespace Gecode { namespace Int { namespace NValues {
00037 
00038   forceinline int
00039   SymBitMatrix::pos(int x, int y) const {
00040     assert(x < y);
00041     return (x*(2*n-x-1)) / 2 + y - x - 1;
00042   }
00043 
00044   forceinline
00045   SymBitMatrix::SymBitMatrix(Region& r, int n0)
00046     : Support::BitSet<Region>(r,static_cast<unsigned int>((n0*n0-n0)/2)),
00047       n(n0) {}
00048 
00049   forceinline bool
00050   SymBitMatrix::get(int x, int y) const {
00051     assert(x != y);
00052     if (x > y) std::swap(x,y);
00053     return Support::BitSet<Region>::get(static_cast<unsigned int>(pos(x,y)));
00054   }
00055 
00056   forceinline void
00057   SymBitMatrix::set(int x, int y) {
00058     assert(x != y);
00059     if (x > y) std::swap(x,y);
00060     Support::BitSet<Region>::set(static_cast<unsigned int>(pos(x,y)));
00061   }
00062 
00063 }}}
00064 
00065 // STATISTICS: int-prop