45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* 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 libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2011 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_BITWISE_HPP
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#define __UTIL_BITWISE_HPP
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#include <cstdint>
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#include "debug.hpp"
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const uint8_t BITMASK_1BITS = 0x01;
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const uint8_t BITMASK_2BITS = 0x03;
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const uint8_t BITMASK_3BITS = 0x07;
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const uint8_t BITMASK_4BITS = 0x0F;
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const uint8_t BITMASK_5BITS = 0x1F;
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const uint8_t BITMASK_6BITS = 0x3F;
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const uint8_t BITMASK_7BITS = 0x7F;
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const uint8_t BITMASK_8BITS = 0xFF;
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template <typename T>
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T rotate_left (const T &value, size_t magnitude) {
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magnitude %= sizeof (T) * 8;
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return (value << magnitude) | (value >> sizeof (value) * 8 - magnitude);
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}
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#endif
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