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-- Copyright (C) 2010 Toni Gundogdu <legatvs@gmail.com>
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-- This file is part of quvi <http://quvi.sourceforge.net/>.
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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; either
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-- version 2.1 of the License, or (at your option) any later version.
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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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-- 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
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function M.bit_or (x, y) -- http://is.gd/iVg4x
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while p < x do p = p + p end
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while p < y do p = p + p end
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if p <= x or p <= y then
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if p <= x then x = x - p end
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if p <= y then y = y - p end
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function M.bit (p) return 2 ^ (p - 1) end
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-- e.g. "if has_bit (foo, bit (n)) then ..."
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function M.has_bit(x, p) return x % (p + p) >= p end
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-- vim: set ts=4 sw=4 tw=72 expandtab: