| 1 | // file : xsd/cxx/tree/parsing/double.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_PARSING_DOUBLE_HXX |
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| 7 | #define XSD_CXX_TREE_PARSING_DOUBLE_HXX |
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| 8 | |
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| 9 | #include <limits> |
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| 10 | #include <locale> |
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| 11 | |
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| 12 | #include <xsd/cxx/ro-string.hxx> |
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| 13 | #include <xsd/cxx/zc-istream.hxx> |
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| 14 | |
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| 15 | #include <xsd/cxx/xml/string.hxx> // xml::transcode |
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| 16 | |
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| 17 | #include <xsd/cxx/tree/text.hxx> // text_content |
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| 18 | #include <xsd/cxx/tree/bits/literals.hxx> |
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| 19 | |
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| 20 | namespace xsd |
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| 21 | { |
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| 22 | namespace cxx |
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| 23 | { |
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| 24 | namespace tree |
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| 25 | { |
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| 26 | template <typename C> |
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| 27 | struct traits<double, C> |
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| 28 | { |
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| 29 | typedef double type; |
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| 30 | |
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| 31 | static type |
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| 32 | create (const xercesc::DOMElement& e, flags f, container* c); |
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| 33 | |
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| 34 | static type |
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| 35 | create (const xercesc::DOMAttr& a, flags f, container* c); |
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| 36 | |
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| 37 | static type |
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| 38 | create (const std::basic_string<C>& s, |
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| 39 | const xercesc::DOMElement*, |
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| 40 | flags, |
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| 41 | container*); |
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| 42 | }; |
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| 43 | |
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| 44 | template <typename C> |
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| 45 | double traits<double, C>:: |
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| 46 | create (const xercesc::DOMElement& e, flags f, container* c) |
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| 47 | { |
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| 48 | return create (text_content<C> (e), 0, f, c); |
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| 49 | } |
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| 50 | |
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| 51 | template <typename C> |
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| 52 | double traits<double, C>:: |
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| 53 | create (const xercesc::DOMAttr& a, flags f, container* c) |
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| 54 | { |
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| 55 | return create (xml::transcode<C> (a.getValue ()), 0, f, c); |
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| 56 | } |
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| 57 | |
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| 58 | template <typename C> |
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| 59 | double traits<double, C>:: |
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| 60 | create (const std::basic_string<C>& s, |
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| 61 | const xercesc::DOMElement*, |
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| 62 | flags, |
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| 63 | container*) |
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| 64 | { |
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| 65 | // This type cannot have whitespaces in its values. As result we |
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| 66 | // don't need to waste time collapsing whitespaces. All we need to |
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| 67 | // do is trim the string representation which can be done without |
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| 68 | // copying. |
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| 69 | // |
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| 70 | ro_string<C> tmp (s); |
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| 71 | trim (tmp); |
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| 72 | |
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| 73 | // @@ We map both xsd:double and xsd:decimal to double and decimal |
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| 74 | // cannot be in scientific notation or be INF/NaN. |
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| 75 | // |
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| 76 | if (tmp == bits::positive_inf<C> ()) |
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| 77 | return std::numeric_limits<double>::infinity (); |
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| 78 | |
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| 79 | if (tmp == bits::negative_inf<C> ()) |
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| 80 | return -std::numeric_limits<double>::infinity (); |
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| 81 | |
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| 82 | if (tmp == bits::nan<C> ()) |
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| 83 | return std::numeric_limits<double>::quiet_NaN (); |
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| 84 | |
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| 85 | zc_istream<C> is (tmp); |
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| 86 | is.imbue (std::locale::classic ()); |
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| 87 | |
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| 88 | type t; |
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| 89 | is >> t; |
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| 90 | |
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| 91 | return t; |
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| 92 | } |
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| 93 | } |
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| 94 | } |
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| 95 | } |
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| 96 | |
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| 97 | #endif // XSD_CXX_TREE_PARSING_DOUBLE_HXX |
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