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5ae5006dde
Given that these macros are usually provided by sys/param.h, better move them to compat.h.
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/*
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* include/common/tools.h
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* Trivial macros needed everywhere.
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*
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* Copyright (C) 2000-2011 Willy Tarreau - w@1wt.eu
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*
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* This 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, version 2.1
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* exclusively.
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*
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* This 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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _COMMON_TOOLS_H
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#define _COMMON_TOOLS_H
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#define SWAP(a, b) do { typeof(a) t; t = a; a = b; b = t; } while(0)
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/* return an integer of type <ret> with only the highest bit set. <ret> may be
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* both a variable or a type.
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*/
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#define MID_RANGE(ret) ((typeof(ret))1 << (8*sizeof(ret) - 1))
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/* return the largest possible integer of type <ret>, with all bits set */
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#define MAX_RANGE(ret) (~(typeof(ret))0)
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#endif /* _COMMON_TOOLS_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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