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- /* Definitions of macros to access `dev_t' values.
- Copyright (C) 1996-2016 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>
- __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 /* sys/sysmacros.h */
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