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31 lines
1.2 KiB
C
31 lines
1.2 KiB
C
/* Definitions of macros to access `dev_t' values.
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Copyright (C) 1996-2014 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, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_SYSMACROS_H
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#define _SYS_SYSMACROS_H 1
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/* For compatibility we provide alternative names.
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The problem here is that compilers other than GCC probably don't
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have the `long long' type and so `dev_t' is actually an array. */
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#define major(dev) ((int)(((unsigned int) (dev) >> 8) & 0xff))
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#define minor(dev) ((int)((dev) & 0xff))
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#define makedev(major, minor) (((major) << 8) | (minor))
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#endif /* sys/sysmacros.h */
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