1/* Definitions of macros to access `dev_t' values. 2 Copyright (C) 1996, 1997, 1999, 2003, 2004 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library 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 GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20#ifndef __SYS_SYSMACROS_H 21#define __SYS_SYSMACROS_H 1 22 23static inline unsigned int 24__gnu_dev_major(unsigned long long int __dev) 25{ 26 return ((__dev >> 8) & 0xfff) | ((unsigned int) (__dev >> 32) & ~0xfff); 27} 28 29static inline unsigned int 30__gnu_dev_minor(unsigned long long int __dev) 31{ 32 return (__dev & 0xff) | ((unsigned int) (__dev >> 12) & ~0xff); 33} 34 35static inline unsigned long long int 36__gnu_dev_makedev(unsigned int __major, unsigned int __minor) 37{ 38 return ((__minor & 0xff) | ((__major & 0xfff) << 8) 39 | (((unsigned long long int) (__minor & ~0xff)) << 12) 40 | (((unsigned long long int) (__major & ~0xfff)) << 32)); 41} 42 43/* Access the functions with their traditional names. */ 44#ifndef major 45# define major(dev) __gnu_dev_major (dev) 46#endif 47 48#ifndef minor 49# define minor(dev) __gnu_dev_minor (dev) 50#endif 51 52#ifndef makedev 53# define makedev(maj, min) __gnu_dev_makedev (maj, min) 54#endif 55 56#endif /* sys/sysmacros.h */ 57