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dekker.one
1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Christian Schulte <schulte@gecode.org>
5 *
6 * Copyright:
7 * Christian Schulte, 2011
8 *
9 * This file is part of Gecode, the generic constraint
10 * development environment:
11 * http://www.gecode.org
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining
14 * a copy of this software and associated documentation files (the
15 * "Software"), to deal in the Software without restriction, including
16 * without limitation the rights to use, copy, modify, merge, publish,
17 * distribute, sublicense, and/or sell copies of the Software, and to
18 * permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be
22 * included in all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 *
32 */
33
34#include <algorithm>
35
36namespace Gecode { namespace Int { namespace NValues {
37
38 forceinline int
39 SymBitMatrix::pos(int x, int y) const {
40 assert(x < y);
41 return (x*(2*n-x-1)) / 2 + y - x - 1;
42 }
43
44 forceinline
45 SymBitMatrix::SymBitMatrix(Region& r, int n0)
46 : Support::BitSet<Region>(r,static_cast<unsigned int>((n0*n0-n0)/2)),
47 n(n0) {}
48
49 forceinline bool
50 SymBitMatrix::get(int x, int y) const {
51 assert(x != y);
52 if (x > y) std::swap(x,y);
53 return Support::BitSet<Region>::get(static_cast<unsigned int>(pos(x,y)));
54 }
55
56 forceinline void
57 SymBitMatrix::set(int x, int y) {
58 assert(x != y);
59 if (x > y) std::swap(x,y);
60 Support::BitSet<Region>::set(static_cast<unsigned int>(pos(x,y)));
61 }
62
63}}}
64
65// STATISTICS: int-prop