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vendor/rapidxml-1.13/rapidxml_utils.hpp

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+#ifndef RAPIDXML_UTILS_HPP_INCLUDED
+#define RAPIDXML_UTILS_HPP_INCLUDED
+
+// Copyright (C) 2006, 2009 Marcin Kalicinski
+// Version 1.13
+// Revision $DateTime: 2009/05/13 01:46:17 $
+//! \file rapidxml_utils.hpp This file contains high-level rapidxml utilities that can be useful
+//! in certain simple scenarios. They should probably not be used if maximizing performance is the main objective.
+
+#include "rapidxml.hpp"
+#include <vector>
+#include <string>
+#include <fstream>
+#include <stdexcept>
+
+namespace rapidxml
+{
+
+    //! Represents data loaded from a file
+    template<class Ch = char>
+    class file
+    {
+        
+    public:
+        
+        //! Loads file into the memory. Data will be automatically destroyed by the destructor.
+        //! \param filename Filename to load.
+        file(const char *filename)
+        {
+            using namespace std;
+
+            // Open stream
+            basic_ifstream<Ch> stream(filename, ios::binary);
+            if (!stream)
+                throw runtime_error(string("cannot open file ") + filename);
+            stream.unsetf(ios::skipws);
+            
+            // Determine stream size
+            stream.seekg(0, ios::end);
+            size_t size = stream.tellg();
+            stream.seekg(0);   
+            
+            // Load data and add terminating 0
+            m_data.resize(size + 1);
+            stream.read(&m_data.front(), static_cast<streamsize>(size));
+            m_data[size] = 0;
+        }
+
+        //! Loads file into the memory. Data will be automatically destroyed by the destructor
+        //! \param stream Stream to load from
+        file(std::basic_istream<Ch> &stream)
+        {
+            using namespace std;
+
+            // Load data and add terminating 0
+            stream.unsetf(ios::skipws);
+            m_data.assign(istreambuf_iterator<Ch>(stream), istreambuf_iterator<Ch>());
+            if (stream.fail() || stream.bad())
+                throw runtime_error("error reading stream");
+            m_data.push_back(0);
+        }
+        
+        //! Gets file data.
+        //! \return Pointer to data of file.
+        Ch *data()
+        {
+            return &m_data.front();
+        }
+
+        //! Gets file data.
+        //! \return Pointer to data of file.
+        const Ch *data() const
+        {
+            return &m_data.front();
+        }
+
+        //! Gets file data size.
+        //! \return Size of file data, in characters.
+        std::size_t size() const
+        {
+            return m_data.size();
+        }
+
+    private:
+
+        std::vector<Ch> m_data;   // File data
+
+    };
+
+    //! Counts children of node. Time complexity is O(n).
+    //! \return Number of children of node
+    template<class Ch>
+    inline std::size_t count_children(xml_node<Ch> *node)
+    {
+        xml_node<Ch> *child = node->first_node();
+        std::size_t count = 0;
+        while (child)
+        {
+            ++count;
+            child = child->next_sibling();
+        }
+        return count;
+    }
+
+    //! Counts attributes of node. Time complexity is O(n).
+    //! \return Number of attributes of node
+    template<class Ch>
+    inline std::size_t count_attributes(xml_node<Ch> *node)
+    {
+        xml_attribute<Ch> *attr = node->first_attribute();
+        std::size_t count = 0;
+        while (attr)
+        {
+            ++count;
+            attr = attr->next_attribute();
+        }
+        return count;
+    }
+
+}
+
+#endif