Willy Tarreau | 075a122 | 2006-12-22 14:40:41 +0100 | [diff] [blame] | 1 | /* |
Willy Tarreau | d3db943 | 2011-03-28 15:55:43 +0200 | [diff] [blame] | 2 | * include/common/tools.h |
| 3 | * Trivial macros needed everywhere. |
| 4 | * |
| 5 | * Copyright (C) 2000-2011 Willy Tarreau - w@1wt.eu |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation, version 2.1 |
| 10 | * exclusively. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with this library; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
Willy Tarreau | 075a122 | 2006-12-22 14:40:41 +0100 | [diff] [blame] | 20 | */ |
| 21 | |
| 22 | #ifndef _COMMON_TOOLS_H |
| 23 | #define _COMMON_TOOLS_H |
| 24 | |
Willy Tarreau | 17f449b | 2010-11-07 11:44:13 +0100 | [diff] [blame] | 25 | #include <sys/param.h> |
Willy Tarreau | 075a122 | 2006-12-22 14:40:41 +0100 | [diff] [blame] | 26 | #include <common/config.h> |
| 27 | |
| 28 | #ifndef MIN |
| 29 | #define MIN(a, b) (((a) < (b)) ? (a) : (b)) |
| 30 | #endif |
| 31 | |
| 32 | #ifndef MAX |
| 33 | #define MAX(a, b) (((a) > (b)) ? (a) : (b)) |
| 34 | #endif |
| 35 | |
Emmanuel Hocdet | 6b5b44e | 2019-12-20 17:47:12 +0100 | [diff] [blame^] | 36 | #define SWAP(a, b) do { typeof(a) t; t = a; a = b; b = t; } while(0) |
| 37 | |
Willy Tarreau | d3db943 | 2011-03-28 15:55:43 +0200 | [diff] [blame] | 38 | /* return an integer of type <ret> with only the highest bit set. <ret> may be |
| 39 | * both a variable or a type. |
| 40 | */ |
| 41 | #define MID_RANGE(ret) ((typeof(ret))1 << (8*sizeof(ret) - 1)) |
| 42 | |
| 43 | /* return the largest possible integer of type <ret>, with all bits set */ |
| 44 | #define MAX_RANGE(ret) (~(typeof(ret))0) |
| 45 | |
Willy Tarreau | 075a122 | 2006-12-22 14:40:41 +0100 | [diff] [blame] | 46 | #endif /* _COMMON_TOOLS_H */ |
| 47 | |
| 48 | /* |
| 49 | * Local variables: |
| 50 | * c-indent-level: 8 |
| 51 | * c-basic-offset: 8 |
| 52 | * End: |
| 53 | */ |