1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2010 iX Systems, Inc. 5 * Copyright (c) 2010 Panasas, Inc. 6 * Copyright (c) 2013-2015 Mellanox Technologies, Ltd. 7 * Copyright (c) 2014-2015 François Tigeot 8 * Copyright (c) 2015 Hans Petter Selasky <hselasky@FreeBSD.org> 9 * Copyright (c) 2016 Matt Macy <mmacy@FreeBSD.org> 10 * Copyright (c) 2023 Serenity Cyber Security, LLC. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef _LINUXKPI_LINUX_MINMAX_H_ 35 #define _LINUXKPI_LINUX_MINMAX_H_ 36 37 #include <linux/build_bug.h> 38 #include <linux/compiler.h> 39 #include <linux/types.h> 40 41 #define min(x, y) ((x) < (y) ? (x) : (y)) 42 #define max(x, y) ((x) > (y) ? (x) : (y)) 43 44 #define min3(a, b, c) min(a, min(b, c)) 45 #define max3(a, b, c) max(a, max(b, c)) 46 47 #define min_not_zero(x, y) ({ \ 48 __typeof(x) __min1 = (x); \ 49 __typeof(y) __min2 = (y); \ 50 __min1 == 0 ? __min2 : ((__min2 == 0) ? __min1 : min(__min1, __min2));\ 51 }) 52 53 #define min_t(type, x, y) ({ \ 54 type __min1 = (x); \ 55 type __min2 = (y); \ 56 __min1 < __min2 ? __min1 : __min2; }) 57 58 #define max_t(type, x, y) ({ \ 59 type __max1 = (x); \ 60 type __max2 = (y); \ 61 __max1 > __max2 ? __max1 : __max2; }) 62 63 #define clamp_t(type, _x, min, max) min_t(type, max_t(type, _x, min), max) 64 #define clamp(x, lo, hi) min(max(x, lo), hi) 65 #define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi) 66 67 /* Swap values of a and b */ 68 #define swap(a, b) do { \ 69 __typeof(a) _swap_tmp = a; \ 70 a = b; \ 71 b = _swap_tmp; \ 72 } while (0) 73 74 #endif /* _LINUXKPI_LINUX_MINMAX_H_ */ 75