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41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/* Definitions of functions to access `dev_t' values.
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Copyright (C) 2003-2016 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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#include <endian.h>
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#include <sys/sysmacros.h>
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unsigned int
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gnu_dev_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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unsigned int
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gnu_dev_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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unsigned long long int
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gnu_dev_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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