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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, 2018
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 <gecode/kernel.hh>
35
36namespace Gecode { namespace Kernel {
37
38 bool
39 duplicates(void** p, int n) {
40 assert(n > 1);
41 Support::quicksort<void*>(p,n);
42 for (int i=1; i<n; i++)
43 if (p[i-1] == p[i])
44 return true;
45 return false;
46 }
47
48 bool
49 duplicates(void** p, int n, void** q, int m) {
50 assert((n > 0) && (m > 0));
51 Support::quicksort<void*>(p,n);
52 Support::quicksort<void*>(q,m);
53 int i=0, j=0;
54 do {
55 if (p[i] == q[j])
56 return true;
57 else if (p[i] < q[j])
58 i++;
59 else
60 j++;
61 } while ((i < n) && (j < m));
62 return false;
63 }
64
65}}
66
67// STATISTICS: kernel-other