29 lines
1.1 KiB
C
29 lines
1.1 KiB
C
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/*
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* set.h Macros that look like sigaddset et al. but
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* aren't. They are used to manipulate bits in
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* an integer, to do our signal bookeeping.
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*
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* Copyright (C) 2005 Miquel van Smoorenburg.
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*
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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 General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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*/
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#define ISMEMBER(set, val) ((set) & (1 << (val)))
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#define DELSET(set, val) ((set) &= ~(1 << (val)))
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#define ADDSET(set, val) ((set) |= (1 << (val)))
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#define EMPTYSET(set) ((set) = 0)
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