//  (C) Copyright John Maddock 2006.

//  Use, modification and distribution are subject to the

//  Boost Software License, Version 1.0. (See accompanying file

//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)



#ifndef BOOST_MATH_TOOLS_SIGN_HPP

#define BOOST_MATH_TOOLS_SIGN_HPP



#include <boost/math/tools/config.hpp>

#include <boost/math/special_functions/math_fwd.hpp>



namespace boost{ namespace math{ 



template <class T>

inline int sign BOOST_NO_MACRO_EXPAND(const T& z)

{

   return (z == 0) ? 0 : (z < 0) ? -1 : 1;

}



template <class T>

inline int signbit BOOST_NO_MACRO_EXPAND(const T& z)

{

   return (z < 0) ? 1 : 0;

}



template <class T>

inline T copysign BOOST_NO_MACRO_EXPAND(const T& x, const T& y)

{

   BOOST_MATH_STD_USING

   return fabs(x) * boost::math::sign(y);

}



} // namespace math

} // namespace boost





#endif // BOOST_MATH_TOOLS_SIGN_HPP



