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698be2d8 | 1 | /* MIN, MAX macros. |
9c9d63b1 | 2 | Copyright (C) 1995, 1998, 2001, 2003, 2005, 2009-2021 Free Software |
698be2d8 CB |
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 General Public License as published by | |
7 | the Free Software Foundation; either version 3, 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 General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, see <https://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 */ |