| 1 | // file : xsd/cxx/tree/serialization/float.hxx |
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| 2 | // author : Boris Kolpackov <boris@codesynthesis.com> |
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| 3 | // copyright : Copyright (c) 2005-2008 Code Synthesis Tools CC |
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| 4 | // license : GNU GPL v2 + exceptions; see accompanying LICENSE file |
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| 5 | |
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| 6 | #ifndef XSD_CXX_TREE_SERIALIZATION_FLOAT_HXX |
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| 7 | #define XSD_CXX_TREE_SERIALIZATION_FLOAT_HXX |
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| 8 | |
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| 9 | #include <limits> // std::numeric_limits |
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| 10 | #include <locale> |
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| 11 | #include <sstream> |
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| 12 | |
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| 13 | #include <xsd/cxx/tree/bits/literals.hxx> |
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| 14 | |
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| 15 | // The formula for the number of decimla digits required is given in: |
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| 16 | // |
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| 17 | // http://www2.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1822.pdf |
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| 18 | // |
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| 19 | namespace XERCES_CPP_NAMESPACE |
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| 20 | { |
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| 21 | inline void |
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| 22 | operator<< (xercesc::DOMElement& e, float f) |
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| 23 | { |
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| 24 | if (f == std::numeric_limits<float>::infinity ()) |
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| 25 | e << "INF"; |
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| 26 | else if (f == -std::numeric_limits<float>::infinity ()) |
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| 27 | e << "-INF"; |
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| 28 | else if (!(f == f)) |
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| 29 | e << "NaN"; |
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| 30 | else |
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| 31 | { |
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| 32 | std::basic_ostringstream<char> os; |
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| 33 | os.imbue (std::locale::classic ()); |
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| 34 | |
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| 35 | #ifdef XSD_FP_ALL_DIGITS |
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| 36 | os.precision (2 + std::numeric_limits<float>::digits * 301/1000); |
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| 37 | #else |
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| 38 | os.precision (std::numeric_limits<float>::digits10); |
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| 39 | #endif |
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| 40 | |
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| 41 | os << f; |
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| 42 | e << os.str (); |
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| 43 | } |
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| 44 | } |
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| 45 | |
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| 46 | inline void |
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| 47 | operator<< (xercesc::DOMAttr& a, float f) |
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| 48 | { |
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| 49 | if (f == std::numeric_limits<float>::infinity ()) |
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| 50 | a << "INF"; |
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| 51 | else if (f == -std::numeric_limits<float>::infinity ()) |
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| 52 | a << "-INF"; |
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| 53 | else if (!(f == f)) |
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| 54 | a << "NaN"; |
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| 55 | else |
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| 56 | { |
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| 57 | std::basic_ostringstream<char> os; |
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| 58 | os.imbue (std::locale::classic ()); |
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| 59 | |
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| 60 | #ifdef XSD_FP_ALL_DIGITS |
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| 61 | os.precision (2 + std::numeric_limits<float>::digits * 301/1000); |
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| 62 | #else |
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| 63 | os.precision (std::numeric_limits<float>::digits10); |
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| 64 | #endif |
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| 65 | |
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| 66 | os << f; |
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| 67 | a << os.str (); |
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| 68 | } |
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| 69 | } |
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| 70 | } |
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| 71 | |
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| 72 | namespace xsd |
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| 73 | { |
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| 74 | namespace cxx |
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| 75 | { |
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| 76 | namespace tree |
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| 77 | { |
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| 78 | template <typename C> |
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| 79 | inline void |
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| 80 | operator<< (list_stream<C>& ls, float f) |
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| 81 | { |
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| 82 | if (f == std::numeric_limits<float>::infinity ()) |
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| 83 | ls.os_ << bits::positive_inf<C> (); |
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| 84 | else if (f == -std::numeric_limits<float>::infinity ()) |
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| 85 | ls.os_ << bits::negative_inf<C> (); |
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| 86 | else if (!(f == f)) |
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| 87 | ls.os_ << bits::nan<C> (); |
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| 88 | else |
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| 89 | { |
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| 90 | // We don't need to restore the original locale or precision |
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| 91 | // because items in the list are all of the same type. |
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| 92 | // |
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| 93 | ls.os_.imbue (std::locale::classic ()); |
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| 94 | |
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| 95 | #ifdef XSD_FP_ALL_DIGITS |
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| 96 | ls.os_.precision (2 + std::numeric_limits<float>::digits * 301/1000); |
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| 97 | #else |
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| 98 | ls.os_.precision (std::numeric_limits<float>::digits10); |
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| 99 | #endif |
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| 100 | ls.os_ << f; |
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| 101 | } |
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| 102 | } |
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| 103 | } |
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| 104 | } |
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| 105 | } |
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| 106 | |
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| 107 | #endif // XSD_CXX_TREE_SERIALIZATION_FLOAT_HXX |
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