/* Chrysalide - Outil d'analyse de fichiers binaires
 * macros.h - prototypes de macros utiles
 *
 * Copyright (C) 2009-2012 Cyrille Bagard
 *
 *  This file is part of Chrysalide.
 *
 *  Chrysalide 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.
 *
 *  Chrysalide 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
 */


#ifndef _COMMON_MACROS_H
#define _COMMON_MACROS_H


#include <stddef.h>
#include <stdint.h>



#ifndef NULL
#   define NULL ((void *)0)
#endif


#define container_of(ptr, type, member)                         \
    ({                                                          \
        const typeof(((type *)NULL)->member) *__mptr = (ptr);   \
        (type *)((uint8_t *)__mptr - offsetof(type, member));   \
    })



#endif  /* _COMMON_MACROS_H */