1/* MIN, MAX macros.
2 Copyright (C) 1995, 1998, 2001, 2003, 2005, 2009-2012 Free Software
3 Foundation, Inc.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1, or (at your option)
8 any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program; if not, see <http://www.gnu.org/licenses/>. */
17
18#ifndef _MINMAX_H
19#define _MINMAX_H
20
21/* Note: MIN, MAX are also defined in <sys/param.h> on some systems
22 (glibc, IRIX, HP-UX, OSF/1). Therefore you might get warnings about
23 MIN, MAX macro redefinitions on some systems; the workaround is to
24 #include this file as the last one among the #include list. */
25
26/* Before we define the following symbols we get the <limits.h> file
27 since otherwise we get redefinitions on some systems if <limits.h> is
28 included after this file. Likewise for <sys/param.h>.
29 If more than one of these system headers define MIN and MAX, pick just
30 one of the headers (because the definitions most likely are the same). */
31#if HAVE_MINMAX_IN_LIMITS_H
32# include <limits.h>
33#elif HAVE_MINMAX_IN_SYS_PARAM_H
34# include <sys/param.h>
35#endif
36
37/* Note: MIN and MAX should be used with two arguments of the
38 same type. They might not return the minimum and maximum of their two
39 arguments, if the arguments have different types or have unusual
40 floating-point values. For example, on a typical host with 32-bit 'int',
41 64-bit 'long long', and 64-bit IEEE 754 'double' types:
42
43 MAX (-1, 2147483648) returns 4294967295.
44 MAX (9007199254740992.0, 9007199254740993) returns 9007199254740992.0.
45 MAX (NaN, 0.0) returns 0.0.
46 MAX (+0.0, -0.0) returns -0.0.
47
48 and in each case the answer is in some sense bogus. */
49
50/* MAX(a,b) returns the maximum of A and B. */
51#ifndef MAX
52# define MAX(a,b) ((a) > (b) ? (a) : (b))
53#endif
54
55/* MIN(a,b) returns the minimum of A and B. */
56#ifndef MIN
57# define MIN(a,b) ((a) < (b) ? (a) : (b))
58#endif
59
60#endif /* _MINMAX_H */
61