ivl/details/core/math/platform_specific/isnan_impl.hpp

/* This file is part of the ivl C++ library <http://image.ntua.gr/ivl>.
   A C++ template library extending syntax towards mathematical notation.

   Copyright (C) 2012 Yannis Avrithis <iavr@image.ntua.gr>
   Copyright (C) 2012 Kimon Kontosis <kimonas@image.ntua.gr>

   ivl is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License 
   version 3 as published by the Free Software Foundation.

   Alternatively, you can redistribute it and/or modify it under the terms 
   of the GNU General Public License version 2 as published by the Free 
   Software Foundation.

   ivl is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
   See the GNU General Public License for more details.

   You should have received a copy of the GNU General Public License 
   and a copy of the GNU Lesser General Public License along 
   with ivl. If not, see <http://www.gnu.org/licenses/>. */

#ifdef _MSC_VER
template <class T>
inline
int isnan(T x)
{
        return ::_isnan(x);
}
#else
using std::isnan;
#endif

template<class T>
inline
bool ivl_finite(const T& n)
{
#if defined(__VISUALC__)
    return _finite(n);
#elseif defined(__GNUC__)
    return finite(n);
#else
    return ((n) == (n));
#endif
}

template<class T>
inline
bool ivl_isnan(const T& n)
{
#if defined(__VISUALC__)
    return _isnan(n);
#elseif defined(__GNUC__)
    return isnan(n);
#else
    return ((n) != (n));
#endif
}