5.13

1 files changed, 218 insertions, 0 deletions

diff --git a/zenxml/cvrt_struc.h b/zenxml/cvrt_struc.h
new file mode 100644
index 00000000..5f7f4ad1
--- /dev/null
+++ b/zenxml/cvrt_struc.h
@@ -0,0 +1,218 @@
+// **************************************************************************
+// * This file is part of the zenXML project. It is distributed under the   *
+// * Boost Software License: http://www.boost.org/LICENSE_1_0.txt           *
+// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved        *
+// **************************************************************************
+
+#ifndef ZEN_XML_CONVERT_STRUC_HEADER_018727409908342709743
+#define ZEN_XML_CONVERT_STRUC_HEADER_018727409908342709743
+
+#include "dom.h"
+
+namespace zen
+{
+/**
+\file
+\brief Handle conversion of arbitrary types to and from XML elements.
+See comments in cvrt_text.h
+*/
+
+///Convert XML element to structured user data
+/**
+  \param input The input XML element.
+  \param value Conversion target value.
+  \return "true" if value was read successfully.
+*/
+template <class T> bool readStruc(const XmlElement& input, T& value);
+///Convert structured user data into an XML element
+/**
+  \param value The value to be converted.
+  \param output The output XML element.
+*/
+template <class T> void writeStruc(const T& value, XmlElement& output);
+
+
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
+//------------------------------ implementation -------------------------------------
+namespace impl_2384343
+{
+ZEN_INIT_DETECT_MEMBER_TYPE(value_type);
+ZEN_INIT_DETECT_MEMBER_TYPE(iterator);
+ZEN_INIT_DETECT_MEMBER_TYPE(const_iterator);
+
+ZEN_INIT_DETECT_MEMBER(begin)  //
+ZEN_INIT_DETECT_MEMBER(end)    //we don't know the exact declaration of the member attribute: may be in a base class!
+ZEN_INIT_DETECT_MEMBER(insert) //
+}
+
+template <typename T>
+struct IsStlContainer :
+        StaticBool<
+        impl_2384343::HasMemberType_value_type    <T>::value &&
+        impl_2384343::HasMemberType_iterator      <T>::value &&
+        impl_2384343::HasMemberType_const_iterator<T>::value &&
+        impl_2384343::HasMember_begin             <T>::value &&
+        impl_2384343::HasMember_end               <T>::value &&
+        impl_2384343::HasMember_insert            <T>::value> {};
+
+
+namespace impl_2384343
+{
+ZEN_INIT_DETECT_MEMBER_TYPE(first_type);
+ZEN_INIT_DETECT_MEMBER_TYPE(second_type);
+
+ZEN_INIT_DETECT_MEMBER(first)   //we don't know the exact declaration of the member attribute: may be in a base class!
+ZEN_INIT_DETECT_MEMBER(second)  //
+}
+
+template <typename T>
+struct IsStlPair :
+        StaticBool<
+        impl_2384343::HasMemberType_first_type <T>::value &&
+        impl_2384343::HasMemberType_second_type<T>::value &&
+        impl_2384343::HasMember_first          <T>::value &&
+        impl_2384343::HasMember_second         <T>::value> {};
+
+//######################################################################################
+
+//Conversion from arbitrary types to an XML element
+enum ValueType
+{
+    VALUE_TYPE_STL_CONTAINER,
+    VALUE_TYPE_STL_PAIR,
+    VALUE_TYPE_OTHER,
+};
+
+template <class T>
+struct GetValueType : StaticEnum<ValueType,
+        GetTextType<T>::value != TEXT_TYPE_OTHER ? VALUE_TYPE_OTHER : //some string classes are also STL containers, so check this first
+        IsStlContainer<T>::value ? VALUE_TYPE_STL_CONTAINER :
+        IsStlPair<T>::value      ? VALUE_TYPE_STL_PAIR :
+        VALUE_TYPE_OTHER> {};
+
+
+template <class T, ValueType type>
+struct ConvertElement;
+/* -> expected interface
+{
+	void writeStruc(const T& value, XmlElement& output) const;
+	bool readStruc(const XmlElement& input, T& value) const;
+};
+*/
+
+
+//partial specialization: handle conversion for all STL-container types!
+template <class T>
+struct ConvertElement<T, VALUE_TYPE_STL_CONTAINER>
+{
+    void writeStruc(const T& value, XmlElement& output) const
+    {
+        std::for_each(value.begin(), value.end(),
+                      [&](const typename T::value_type & childVal)
+        {
+            XmlElement& newChild = output.addChild("Item");
+            zen::writeStruc(childVal, newChild);
+        });
+    }
+    bool readStruc(const XmlElement& input, T& value) const
+    {
+        bool success = true;
+        value.clear();
+
+        auto iterPair = input.getChildren("Item");
+        for (auto iter = iterPair.first; iter != iterPair.second; ++iter)
+        {
+            typename T::value_type childVal; //MSVC 2010 bug: cannot put this into a lambda body
+            if (zen::readStruc(*iter, childVal))
+                value.insert(value.end(), childVal);
+            else
+                success = false;
+        }
+        return success;
+    }
+};
+
+
+//partial specialization: handle conversion for std::pair
+template <class T>
+struct ConvertElement<T, VALUE_TYPE_STL_PAIR>
+{
+    void writeStruc(const T& value, XmlElement& output) const
+    {
+        XmlElement& child1 = output.addChild("one"); //don't use "1st/2nd", this will confuse a few pedantic XML parsers
+        zen::writeStruc(value.first, child1);
+
+        XmlElement& child2 = output.addChild("two");
+        zen::writeStruc(value.second, child2);
+    }
+    bool readStruc(const XmlElement& input, T& value) const
+    {
+        bool success = true;
+        const XmlElement* child1 = input.getChild("one");
+        if (!child1 || !zen::readStruc(*child1, value.first))
+            success = false;
+
+        const XmlElement* child2 = input.getChild("two");
+        if (!child2 || !zen::readStruc(*child2, value.second))
+            success = false;
+
+        return success;
+    }
+};
+
+
+//partial specialization: not a pure structured type, try text conversion (thereby respect user specializations of writeText()/readText())
+template <class T>
+struct ConvertElement<T, VALUE_TYPE_OTHER>
+{
+    void writeStruc(const T& value, XmlElement& output) const
+    {
+        std::string tmp;
+        writeText(value, tmp);
+        output.setValue(tmp);
+    }
+    bool readStruc(const XmlElement& input, T& value) const
+    {
+        std::string rawStr;
+        input.getValue(rawStr);
+        return readText(rawStr, value);
+    }
+};
+
+
+template <class T> inline
+void writeStruc(const T& value, XmlElement& output)
+{
+    ConvertElement<T, GetValueType<T>::value>().writeStruc(value, output);
+}
+
+
+template <class T> inline
+bool readStruc(const XmlElement& input, T& value)
+{
+    return ConvertElement<T, GetValueType<T>::value>().readStruc(input, value);
+}
+}
+
+#endif //ZEN_XML_CONVERT_STRUC_HEADER_018727409908342709743