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9a276f8e | 1 | /* Definitions of functions to access `dev_t' values. |
f7a9f785 | 2 | Copyright (C) 2003-2016 Free Software Foundation, Inc. |
9a276f8e UD |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
9a276f8e UD |
18 | |
19 | #include <endian.h> | |
20 | #include <sys/sysmacros.h> | |
21 | ||
22 | unsigned int | |
97716954 | 23 | gnu_dev_major (unsigned long long int dev) |
9a276f8e UD |
24 | { |
25 | return ((dev >> 8) & 0xfff) | ((unsigned int) (dev >> 32) & ~0xfff); | |
26 | } | |
27 | ||
28 | unsigned int | |
97716954 | 29 | gnu_dev_minor (unsigned long long int dev) |
9a276f8e UD |
30 | { |
31 | return (dev & 0xff) | ((unsigned int) (dev >> 12) & ~0xff); | |
32 | } | |
33 | ||
34 | unsigned long long int | |
97716954 | 35 | gnu_dev_makedev (unsigned int major, unsigned int minor) |
9a276f8e UD |
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 | } |