blob: 9aa79b0bddf19c6c31cbacb3e9d31d69708b4e7a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
// file : xsd/cxx/tree/serialization/float.hxx
// copyright : Copyright (c) 2005-2014 Code Synthesis Tools CC
// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
#ifndef XSD_CXX_TREE_SERIALIZATION_FLOAT_HXX
#define XSD_CXX_TREE_SERIALIZATION_FLOAT_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 (float f)
{
std::basic_string<C> r;
if (f == std::numeric_limits<float>::infinity ())
r = bits::positive_inf<C> ();
else if (f == -std::numeric_limits<float>::infinity ())
r = bits::negative_inf<C> ();
else if (!(f == f))
r = bits::nan<C> ();
else
{
std::basic_ostringstream<C> os;
os.imbue (std::locale::classic ());
// Precision.
//
#if defined (XSD_CXX_TREE_FLOAT_PRECISION_MAX)
os.precision (2 + std::numeric_limits<float>::digits * 301/1000);
#elif defined (XSD_CXX_TREE_FLOAT_PRECISION)
os.precision (XSD_CXX_TREE_FLOAT_PRECISION);
#else
os.precision (std::numeric_limits<float>::digits10);
#endif
// Format.
//
#if defined (XSD_CXX_TREE_FLOAT_FIXED)
os << std::fixed << f;
#elif defined (XSD_CXX_TREE_FLOAT_SCIENTIFIC)
os << std::scientific << f;
#else
os << f;
#endif
r = os.str ();
}
return r;
}
}
template <typename C>
inline void
operator<< (list_stream<C>& ls, float f)
{
ls.os_ << bits::insert<C> (f);
}
}
}
}
namespace XERCES_CPP_NAMESPACE
{
inline void
operator<< (xercesc::DOMElement& e, float f)
{
e << xsd::cxx::tree::bits::insert<char> (f);
}
inline void
operator<< (xercesc::DOMAttr& a, float f)
{
a << xsd::cxx::tree::bits::insert<char> (f);
}
}
#endif // XSD_CXX_TREE_SERIALIZATION_FLOAT_HXX
|