A Discrete-Event Network Simulator
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math.h
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1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation;
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
14 *
15 *
16 * FreeBSD log2 patch from graphviz port to FreeBSD 9, courtesy of
17 * Christoph Moench-Tegeder <cmt@burggraben.net>
18 */
19
20// It is recommended to include this header instead of <math.h> or
21// <cmath> whenever the log2(x) function is needed. See bug 1467.
22
23#ifndef MATH_H
24#define MATH_H
25
32#include <cmath>
33
34#ifdef __FreeBSD__
35
36#if __FreeBSD_version <= 704101 || (__FreeBSD_version >= 800000 && __FreeBSD_version < 802502) || \
37 (__FreeBSD_version >= 900000 && __FreeBSD_version < 900027)
38#define log2(x) (std::log(x) / M_LN2)
39#endif /* __FreeBSD_version */
40
41#endif /* __FreeBSD__ */
42
43#endif /* MATH_H */