1 | /* Definitions of functions to access `dev_t' values. |
2 | Copyright (C) 2003-2016 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, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <endian.h> |
20 | #include <sys/sysmacros.h> |
21 | |
22 | unsigned int |
23 | gnu_dev_major (unsigned long long int dev) |
24 | { |
25 | return ((dev >> 8) & 0xfff) | ((unsigned int) (dev >> 32) & ~0xfff); |
26 | } |
27 | |
28 | unsigned int |
29 | gnu_dev_minor (unsigned long long int dev) |
30 | { |
31 | return (dev & 0xff) | ((unsigned int) (dev >> 12) & ~0xff); |
32 | } |
33 | |
34 | unsigned long long int |
35 | gnu_dev_makedev (unsigned int major, unsigned int minor) |
36 | { |
37 | return ((minor & 0xff) | ((major & 0xfff) << 8) |
38 | | (((unsigned long long int) (minor & ~0xff)) << 12) |
39 | | (((unsigned long long int) (major & ~0xfff)) << 32)); |
40 | } |
41 | |