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