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Scalable High-Availability cluster resource manager
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lib
gnu
byteswap.in.h
Go to the documentation of this file.
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/* byteswap.h - Byte swapping
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Copyright (C) 2005, 2007, 2009-2020 Free Software Foundation, Inc.
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Written by Oskar Liljeblad <oskar@osk.mine.nu>, 2005.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program 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
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef _GL_BYTESWAP_H
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#define _GL_BYTESWAP_H
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/* Given an unsigned 16-bit argument X, return the value corresponding to
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X with reversed byte order. */
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#define bswap_16(x) ((((x) & 0x00FF) << 8) | \
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(((x) & 0xFF00) >> 8))
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/* Given an unsigned 32-bit argument X, return the value corresponding to
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X with reversed byte order. */
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#define bswap_32(x) ((((x) & 0x000000FF) << 24) | \
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(((x) & 0x0000FF00) << 8) | \
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(((x) & 0x00FF0000) >> 8) | \
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(((x) & 0xFF000000) >> 24))
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/* Given an unsigned 64-bit argument X, return the value corresponding to
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X with reversed byte order. */
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#define bswap_64(x) ((((x) & 0x00000000000000FFULL) << 56) | \
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(((x) & 0x000000000000FF00ULL) << 40) | \
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(((x) & 0x0000000000FF0000ULL) << 24) | \
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(((x) & 0x00000000FF000000ULL) << 8) | \
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(((x) & 0x000000FF00000000ULL) >> 8) | \
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(((x) & 0x0000FF0000000000ULL) >> 24) | \
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(((x) & 0x00FF000000000000ULL) >> 40) | \
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(((x) & 0xFF00000000000000ULL) >> 56))
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#endif
/* _GL_BYTESWAP_H */
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