44 lines
962 B
C++
Executable File
44 lines
962 B
C++
Executable File
// (C) Copyright John Maddock 2006.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_MATH_TOOLS_SIGN_HPP
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#define BOOST_MATH_TOOLS_SIGN_HPP
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#ifdef _MSC_VER
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#pragma once
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#endif
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#include <boost/math/tools/config.hpp>
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#include <boost/math/special_functions/math_fwd.hpp>
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namespace boost{ namespace math{
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template <class T>
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inline int sign BOOST_NO_MACRO_EXPAND(const T& z)
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{
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return (z == 0) ? 0 : (z < 0) ? -1 : 1;
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}
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template <class T>
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inline int signbit BOOST_NO_MACRO_EXPAND(const T& z)
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{
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return (z < 0) ? 1 : 0;
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}
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template <class T>
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inline T copysign BOOST_NO_MACRO_EXPAND(const T& x, const T& y)
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{
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BOOST_MATH_STD_USING
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return fabs(x) * boost::math::sign(y);
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}
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} // namespace math
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} // namespace boost
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#endif // BOOST_MATH_TOOLS_SIGN_HPP
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