diff options
author | Ulrich Drepper <drepper@redhat.com> | 2003-09-24 05:05:38 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2003-09-24 05:05:38 +0000 |
commit | 9a276f8e1e25b558e893e34f9ae6d64130f87cf6 (patch) | |
tree | 87eb9a27092bf6e7cd5bd520cbca5bca66a6f358 /sysdeps/unix/sysv/linux/sys | |
parent | 54ee14b3882bc7f2fcace383ee12da765e86e2ee (diff) | |
download | glibc-9a276f8e1e25b558e893e34f9ae6d64130f87cf6.zip glibc-9a276f8e1e25b558e893e34f9ae6d64130f87cf6.tar.gz glibc-9a276f8e1e25b558e893e34f9ae6d64130f87cf6.tar.bz2 |
Update.
* 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>
Diffstat (limited to 'sysdeps/unix/sysv/linux/sys')
-rw-r--r-- | sysdeps/unix/sysv/linux/sys/sysmacros.h | 63 |
1 files changed, 39 insertions, 24 deletions
diff --git a/sysdeps/unix/sysv/linux/sys/sysmacros.h b/sysdeps/unix/sysv/linux/sys/sysmacros.h index e482aab..ca1e0d4 100644 --- a/sysdeps/unix/sysv/linux/sys/sysmacros.h +++ b/sysdeps/unix/sysv/linux/sys/sysmacros.h @@ -1,5 +1,5 @@ /* Definitions of macros to access `dev_t' values. - Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1999, 2003 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 @@ -20,30 +20,45 @@ #ifndef _SYS_SYSMACROS_H #define _SYS_SYSMACROS_H 1 -/* For compatibility we provide alternative names. - - The problem here is that compilers other than GCC probably don't - have the `long long' type and so `dev_t' is actually an array. */ -#if defined __GNUC__ && __GNUC__ >= 2 -# define major(dev) ((int)(((dev) >> 8) & 0xff)) -# define minor(dev) ((int)((dev) & 0xff)) -# define makedev(major, minor) ((((unsigned int) (major)) << 8) \ - | ((unsigned int) (minor))) -#else -/* We need to know the word order here. This assumes that the word order - is consistent with the byte order. */ -# include <endian.h> -# if __BYTE_ORDER == __BIG_ENDIAN -# define major(dev) (((dev).__val[1] >> 8) & 0xff) -# define minor(dev) ((dev).__val[1] & 0xff) -# define makedev(major, minor) { 0, ((((unsigned int) (major)) << 8) \ - | ((unsigned int) (minor))) } -# else -# define major(dev) (((dev).__val[0] >> 8) & 0xff) -# define minor(dev) ((dev).__val[0] & 0xff) -# define makedev(major, minor) { ((((unsigned int) (major)) << 8) \ - | ((unsigned int) (minor))), 0 } +#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 +extern unsigned int inline major (unsigned long long int __dev) __THROW; +extern unsigned int inline minor (unsigned long long int __dev) __THROW; +extern unsigned long long int inline makedev (unsigned int __major, + unsigned int __minor) __THROW; + +# if defined __GNUC__ && __GNUC__ >= 2 +extern inline unsigned int +major (unsigned long long int __dev) +{ + return ((__dev >> 8) & 0xfff) | ((unsigned int) (__dev >> 32) & ~0xfff); +} + +extern inline unsigned int +minor (unsigned long long int __dev) +{ + return (__dev & 0xff) | ((unsigned int) (__dev >> 12) & ~0xff); +} + +extern inline unsigned long long int +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 + + +/* Historically the three symbols were macros. In case some programs + use #ifdef to check for definition provide some dummy macros. */ +# define major(dev) major (dev) +# define minor(dev) minor (dev) +# define makedev(maj, min) makedev (maj, min) #endif #endif /* sys/sysmacros.h */ |