blob: 76eaf9f9d886ef21de14abdd60ee14ac43b167ef (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/* Definitions of macros to access `dev_t' values.
Copyright (C) 1996-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_SYSMACROS_H
#define _SYS_SYSMACROS_H 1
#include <features.h>
/* If the compiler does not know long long it is out of luck. We are
not going to hack weird hacks to support the dev_t representation
they need. */
#ifdef __GLIBC_HAVE_LONG_LONG
__BEGIN_DECLS
__extension__
extern unsigned int gnu_dev_major (unsigned long long int __dev)
__THROW __attribute_const__;
__extension__
extern unsigned int gnu_dev_minor (unsigned long long int __dev)
__THROW __attribute_const__;
__extension__
extern unsigned long long int gnu_dev_makedev (unsigned int __major,
unsigned int __minor)
__THROW __attribute_const__;
# ifdef __USE_EXTERN_INLINES
__extension__ __extern_inline __attribute_const__ unsigned int
__NTH (gnu_dev_major (unsigned long long int __dev))
{
return ((__dev >> 8) & 0xfff) | ((unsigned int) (__dev >> 32) & ~0xfff);
}
__extension__ __extern_inline __attribute_const__ unsigned int
__NTH (gnu_dev_minor (unsigned long long int __dev))
{
return (__dev & 0xff) | ((unsigned int) (__dev >> 12) & ~0xff);
}
__extension__ __extern_inline __attribute_const__ unsigned long long int
__NTH (gnu_dev_makedev (unsigned int __major, unsigned int __minor))
{
return ((__minor & 0xff) | ((__major & 0xfff) << 8)
| (((unsigned long long int) (__minor & ~0xff)) << 12)
| (((unsigned long long int) (__major & ~0xfff)) << 32));
}
# endif
__END_DECLS
/* Access the functions with their traditional names. */
# define major(dev) gnu_dev_major (dev)
# define minor(dev) gnu_dev_minor (dev)
# define makedev(maj, min) gnu_dev_makedev (maj, min)
#endif
#endif /* sys/sysmacros.h */
|
