[111] | 1 | // file : xsd/cxx/tree/parsing/float.hxx |
---|
| 2 | // author : Boris Kolpackov <boris@codesynthesis.com> |
---|
| 3 | // copyright : Copyright (c) 2005-2008 Code Synthesis Tools CC |
---|
| 4 | // license : GNU GPL v2 + exceptions; see accompanying LICENSE file |
---|
| 5 | |
---|
| 6 | #ifndef XSD_CXX_TREE_PARSING_FLOAT_HXX |
---|
| 7 | #define XSD_CXX_TREE_PARSING_FLOAT_HXX |
---|
| 8 | |
---|
| 9 | #include <limits> |
---|
| 10 | #include <locale> |
---|
| 11 | |
---|
| 12 | #include <xsd/cxx/ro-string.hxx> |
---|
| 13 | #include <xsd/cxx/zc-istream.hxx> |
---|
| 14 | |
---|
| 15 | #include <xsd/cxx/xml/string.hxx> // xml::transcode |
---|
| 16 | |
---|
| 17 | #include <xsd/cxx/tree/text.hxx> // text_content |
---|
| 18 | #include <xsd/cxx/tree/bits/literals.hxx> |
---|
| 19 | |
---|
| 20 | namespace xsd |
---|
| 21 | { |
---|
| 22 | namespace cxx |
---|
| 23 | { |
---|
| 24 | namespace tree |
---|
| 25 | { |
---|
| 26 | template <typename C> |
---|
| 27 | struct traits<float, C> |
---|
| 28 | { |
---|
| 29 | typedef float type; |
---|
| 30 | |
---|
| 31 | static type |
---|
| 32 | create (const xercesc::DOMElement& e, flags f, container* c); |
---|
| 33 | |
---|
| 34 | static type |
---|
| 35 | create (const xercesc::DOMAttr& a, flags f, container* c); |
---|
| 36 | |
---|
| 37 | static type |
---|
| 38 | create (const std::basic_string<C>& s, |
---|
| 39 | const xercesc::DOMElement*, |
---|
| 40 | flags, |
---|
| 41 | container*); |
---|
| 42 | }; |
---|
| 43 | |
---|
| 44 | template <typename C> |
---|
| 45 | float traits<float, C>:: |
---|
| 46 | create (const xercesc::DOMElement& e, flags f, container* c) |
---|
| 47 | { |
---|
| 48 | return create (text_content<C> (e), 0, f, c); |
---|
| 49 | } |
---|
| 50 | |
---|
| 51 | template <typename C> |
---|
| 52 | float traits<float, C>:: |
---|
| 53 | create (const xercesc::DOMAttr& a, flags f, container* c) |
---|
| 54 | { |
---|
| 55 | return create (xml::transcode<C> (a.getValue ()), 0, f, c); |
---|
| 56 | } |
---|
| 57 | |
---|
| 58 | template <typename C> |
---|
| 59 | float traits<float, C>:: |
---|
| 60 | create (const std::basic_string<C>& s, |
---|
| 61 | const xercesc::DOMElement*, |
---|
| 62 | flags, |
---|
| 63 | container*) |
---|
| 64 | { |
---|
| 65 | // This type cannot have whitespaces in its values. As result we |
---|
| 66 | // don't need to waste time collapsing whitespaces. All we need to |
---|
| 67 | // do is trim the string representation which can be done without |
---|
| 68 | // copying. |
---|
| 69 | // |
---|
| 70 | ro_string<C> tmp (s); |
---|
| 71 | trim (tmp); |
---|
| 72 | |
---|
| 73 | if (tmp == bits::positive_inf<C> ()) |
---|
| 74 | return std::numeric_limits<float>::infinity (); |
---|
| 75 | |
---|
| 76 | if (tmp == bits::negative_inf<C> ()) |
---|
| 77 | return -std::numeric_limits<float>::infinity (); |
---|
| 78 | |
---|
| 79 | if (tmp == bits::nan<C> ()) |
---|
| 80 | return std::numeric_limits<float>::quiet_NaN (); |
---|
| 81 | |
---|
| 82 | zc_istream<C> is (tmp); |
---|
| 83 | is.imbue (std::locale::classic ()); |
---|
| 84 | |
---|
| 85 | type t; |
---|
| 86 | is >> t; |
---|
| 87 | |
---|
| 88 | return t; |
---|
| 89 | } |
---|
| 90 | } |
---|
| 91 | } |
---|
| 92 | } |
---|
| 93 | |
---|
| 94 | #endif // XSD_CXX_TREE_PARSING_FLOAT_HXX |
---|