1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/math/complex/acosh.hpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,34 @@
     1.4 +//  (C) Copyright John Maddock 2005.
     1.5 +//  Use, modification and distribution are subject to the
     1.6 +//  Boost Software License, Version 1.0. (See accompanying file
     1.7 +//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
     1.8 +
     1.9 +#ifndef BOOST_MATH_COMPLEX_ACOSH_INCLUDED
    1.10 +#define BOOST_MATH_COMPLEX_ACOSH_INCLUDED
    1.11 +
    1.12 +#ifndef BOOST_MATH_COMPLEX_DETAILS_INCLUDED
    1.13 +#  include <boost/math/complex/details.hpp>
    1.14 +#endif
    1.15 +#ifndef BOOST_MATH_COMPLEX_ATANH_INCLUDED
    1.16 +#  include <boost/math/complex/acos.hpp>
    1.17 +#endif
    1.18 +
    1.19 +namespace boost{ namespace math{
    1.20 +
    1.21 +template<class T> 
    1.22 +inline std::complex<T> acosh(const std::complex<T>& z)
    1.23 +{
    1.24 +   //
    1.25 +   // We use the relation acosh(z) = +-i acos(z)
    1.26 +   // Choosing the sign of multiplier to give real(acosh(z)) >= 0
    1.27 +   // as well as compatibility with C99.
    1.28 +   //
    1.29 +   std::complex<T> result = boost::math::acos(z);
    1.30 +   if(!detail::test_is_nan(result.imag()) && result.imag() <= 0)
    1.31 +      return detail::mult_i(result);
    1.32 +   return detail::mult_minus_i(result);
    1.33 +}
    1.34 +
    1.35 +} } // namespaces
    1.36 +
    1.37 +#endif // BOOST_MATH_COMPLEX_ACOSH_INCLUDED