From: Michael Göhler Date: Tue, 30 Sep 2014 12:35:59 +0000 (+0200) Subject: add comment to common.h X-Git-Url: https://git.danieliu.xyz/?a=commitdiff_plain;h=be20bc40619598a5c9af8234ae81ce0a6899651f;p=smdp.git add comment to common.h --- diff --git a/include/common.h b/include/common.h index 23b656c..99c4382 100644 --- a/include/common.h +++ b/include/common.h @@ -1,6 +1,31 @@ #if !defined( COMMON_H ) #define COMMON_H +/* + * Common macros. + * Copyright (C) 2014 Michael Goehler + * + * This file is part of mdp. + * + * This program 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. + * + * This program 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 this program. If not, see . + * + * + * macro: MAX returns the higher one of two input variables + * macro: MIN returns the lower one of two input variables + * + */ + #define MAX(a, b) ({ typeof(a) _a = a; typeof(b) _b = b; _a > _b? _a : _b; }) #define MIN(a, b) ({ typeof(a) _a = a; typeof(b) _b = b; _a < _b? _a : _b; })