| 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 | |
| 23 | static 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 | |
| 29 | static inline unsigned int |
| 30 | __gnu_dev_minor(unsigned long long int __dev) |
| 31 | { |
| 32 | return (__dev & 0xff) | ((unsigned int) (__dev >> 12) & ~0xff); |
| 33 | } |
| 34 | |
| 35 | static 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 | |
