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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, 2012
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#ifdef _MSC_VER
35
36#define _CRT_RAND_S
37#include <stdlib.h>
38
39#include <gecode/support.hh>
40
41namespace Gecode { namespace Support {
42
43 unsigned int hwrnd(void) {
44 unsigned int r;
45 (void) rand_s(&r);
46 return r;
47 }
48
49}}
50
51#else
52
53#include <gecode/support.hh>
54
55#include <fstream>
56
57namespace Gecode { namespace Support {
58
59 unsigned int hwrnd(void) {
60 std::fstream devrandom;
61 devrandom.open("/dev/random", std::fstream::in);
62 unsigned int rnd;
63 devrandom.read(reinterpret_cast<char*>(&rnd),sizeof(unsigned int));
64 devrandom.close();
65 return rnd;
66 }
67
68}}
69
70#endif
71
72// STATISTICS: support-any
73