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9a276f8e1e
* sysdeps/unix/sysv/linux/sys/sysmacros.h: Adjust for larger kernel dev_t size. * sysdeps/unix/sysv/linux/makedev.c: New file. * sysdeps/unix/sysv/linux/Dist: Add makedev.c. * sysdeps/unix/sysv/linux/Makefile [subdir=misc] (sysdep_routines): Add makedev. * sysdeps/unix/sysv/linux/Versions [libc] (GLIBC_2.3.3): Add major, minor, makedev. 2003-09-23 Ulrich Drepper <drepper@redhat.com>
64 lines
2.3 KiB
C
64 lines
2.3 KiB
C
/* Definitions of macros to access `dev_t' values.
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Copyright (C) 1996, 1997, 1999, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _SYS_SYSMACROS_H
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#define _SYS_SYSMACROS_H 1
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#include <features.h>
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/* If the compiler does not know long long it is out of luck. We are
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not going to hack weird hacks to support the dev_t representation
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they need. */
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#ifdef __GLIBC_HAVE_LONG_LONG
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extern unsigned int inline major (unsigned long long int __dev) __THROW;
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extern unsigned int inline minor (unsigned long long int __dev) __THROW;
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extern unsigned long long int inline makedev (unsigned int __major,
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unsigned int __minor) __THROW;
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# if defined __GNUC__ && __GNUC__ >= 2
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extern inline unsigned int
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major (unsigned long long int __dev)
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{
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return ((__dev >> 8) & 0xfff) | ((unsigned int) (__dev >> 32) & ~0xfff);
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}
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extern inline unsigned int
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minor (unsigned long long int __dev)
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{
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return (__dev & 0xff) | ((unsigned int) (__dev >> 12) & ~0xff);
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}
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extern inline unsigned long long int
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makedev (unsigned int __major, unsigned int __minor)
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{
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return ((__minor & 0xff) | ((__major & 0xfff) << 8)
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| (((unsigned long long int) (__minor & ~0xff)) << 12)
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| (((unsigned long long int) (__major & ~0xfff)) << 32));
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}
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# endif
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/* Historically the three symbols were macros. In case some programs
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use #ifdef to check for definition provide some dummy macros. */
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# define major(dev) major (dev)
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# define minor(dev) minor (dev)
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# define makedev(maj, min) makedev (maj, min)
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#endif
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#endif /* sys/sysmacros.h */
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