mirror of
https://github.com/bolero-MURAKAMI/Sprout
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42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2013 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_BIT_ROTATE_HPP
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#define SPROUT_BIT_ROTATE_HPP
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#include <cstddef>
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#include <climits>
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#include <type_traits>
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#include <sprout/config.hpp>
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namespace sprout {
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//
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// left_rotate
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//
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template<typename T>
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inline SPROUT_CONSTEXPR typename std::enable_if<
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std::is_integral<T>::value,
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T
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>::type
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left_rotate(T x, std::size_t n) {
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return (x << n) ^ (x >> (sizeof(T) * CHAR_BIT - n));
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}
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//
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// right_rotate
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//
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template<typename T>
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inline SPROUT_CONSTEXPR typename std::enable_if<
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std::is_integral<T>::value,
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T
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>::type
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right_rotate(T x, std::size_t n) {
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return (x >> n) ^ (x << (sizeof(T) * CHAR_BIT - n));
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_BIT_ROTATE_HPP
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