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// file : xsd/cxx/tree/serialization/double.hxx
// copyright : Copyright (c) 2005-2014 Code Synthesis Tools CC
// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
#ifndef XSD_CXX_TREE_SERIALIZATION_DOUBLE_HXX
#define XSD_CXX_TREE_SERIALIZATION_DOUBLE_HXX
#include <limits> // std::numeric_limits
#include <locale>
#include <sstream>
#include <xsd/cxx/tree/bits/literals.hxx>
namespace xsd
{
namespace cxx
{
namespace tree
{
namespace bits
{
// The formula for the number of decimla digits required is given in:
//
// http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1822.pdf
//
template <typename C>
std::basic_string<C>
insert (const as_double<double>& d)
{
std::basic_string<C> r;
if (d.x == std::numeric_limits<double>::infinity ())
r = bits::positive_inf<C> ();
else if (d.x == -std::numeric_limits<double>::infinity ())
r = bits::negative_inf<C> ();
else if (!(d.x == d.x))
r = bits::nan<C> ();
else
{
std::basic_ostringstream<C> os;
os.imbue (std::locale::classic ());
// Precision.
//
#if defined (XSD_CXX_TREE_DOUBLE_PRECISION_MAX)
os.precision (2 + std::numeric_limits<double>::digits * 301/1000);
#elif defined (XSD_CXX_TREE_DOUBLE_PRECISION)
os.precision (XSD_CXX_TREE_DOUBLE_PRECISION);
#else
os.precision (std::numeric_limits<double>::digits10);
#endif
// Format.
//
#if defined (XSD_CXX_TREE_DOUBLE_FIXED)
os << std::fixed << d.x;
#elif defined (XSD_CXX_TREE_DOUBLE_SCIENTIFIC)
os << std::scientific << d.x;
#else
os << d.x;
#endif
r = os.str ();
}
return r;
}
}
template <typename C>
inline void
operator<< (list_stream<C>& ls, const as_double<double>& d)
{
ls.os_ << bits::insert<C> (d);
}
}
}
}
namespace XERCES_CPP_NAMESPACE
{
inline void
operator<< (xercesc::DOMElement& e,
const xsd::cxx::tree::as_double<double>& d)
{
e << xsd::cxx::tree::bits::insert<char> (d);
}
inline void
operator<< (xercesc::DOMAttr& a,
const xsd::cxx::tree::as_double<double>& d)
{
a << xsd::cxx::tree::bits::insert<char> (d);
}
}
#endif // XSD_CXX_TREE_SERIALIZATION_DOUBLE_HXX
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