1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// Copyright 2002, 2003, 2004, 2005, 2006 David Hilvert <dhilvert@auricle.dyndns.org>,
// <dhilvert@ugcs.caltech.edu>
/* This file is part of the Anti-Lamenessing Engine.
The Anti-Lamenessing Engine is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
The Anti-Lamenessing Engine is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the Anti-Lamenessing Engine; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __ale_math_h__
#define __ale_math_h__
/*
* Certain versions of Mac OSX may disable math.h definitions of is*() macros
* when iostream is included, so we include the latter here.
*/
#include <math.h>
#include <iostream>
/*
* isnan() and isinf() code logic are based on those noted in the GNU Autoconf
* manual, by the Free Software Foundation:
*
* http://www.gnu.org/software/autoconf/manual/html_node/Function-Portability.html
*
* As C++ is available here, we use C++ overloading instead of sizeof()
* switches to handle different types.
*/
#define FIXED16 4
#define FIXED32 5
#if ALE_COLORS == FIXED16 || ALE_COLORS == FIXED32 \
|| ALE_COORDINATES == FIXED16 || ALE_COORDINATES == FIXED32
/*
* Since we need custom isnan and isinf for fixed-point values, we disable any
* such macros provided.
*/
#undef isnan
#undef isinf
#endif
#undef FIXED16
#undef FIXED32
#ifndef isnan
# define isnan(x) ale_isnan(x)
static inline int ale_isnan(float x) { return x != x; }
static inline int ale_isnan(double x) { return x != x; }
static inline int ale_isnan(long double x) { return x != x; }
#endif
#ifndef isinf
# define isinf(x) ale_isinf(x)
static inline int ale_isinf(float x) { return isnan (x - x); }
static inline int ale_isinf(double x) { return isnan (x - x); }
static inline int ale_isinf(long double x) { return isnan (x - x); }
#endif
#endif
|