ceph/src/boost/libs/geometry/doc/src/docutils/tools/doxygen_xml2qbk/contrib/rapidxml-1.13/rapidxml_utils.hpp

   1 #ifndef RAPIDXML_UTILS_HPP_INCLUDED
   2 #define RAPIDXML_UTILS_HPP_INCLUDED
   3
   4 // Copyright (C) 2006, 2009 Marcin Kalicinski
   5 // Version 1.13
   6 // Revision $DateTime: 2009/05/13 01:46:17 $
   7 //! \file rapidxml_utils.hpp This file contains high-level rapidxml utilities that can be useful
   8 //! in certain simple scenarios. They should probably not be used if maximizing performance is the main objective.
   9
  10 #include "rapidxml.hpp"
  11 #include <vector>
  12 #include <string>
  13 #include <fstream>
  14 #include <stdexcept>
  15
  16 namespace rapidxml
  17 {
  18
  19     //! Represents data loaded from a file
  20     template<class Ch = char>
  21     class file
  22     {
  23
  24     public:
  25
  26         //! Loads file into the memory. Data will be automatically destroyed by the destructor.
  27         //! \param filename Filename to load.
  28         file(const char *filename)
  29         {
  30             using namespace std;
  31
  32             // Open stream
  33             basic_ifstream<Ch> stream(filename, ios::binary);
  34             if (!stream)
  35                 throw runtime_error(string("cannot open file ") + filename);
  36             stream.unsetf(ios::skipws);
  37
  38             // Determine stream size
  39             stream.seekg(0, ios::end);
  40             size_t size = stream.tellg();
  41             stream.seekg(0);
  42
  43             // Load data and add terminating 0
  44             m_data.resize(size + 1);
  45             stream.read(&m_data.front(), static_cast<streamsize>(size));
  46             m_data[size] = 0;
  47         }
  48
  49         //! Loads file into the memory. Data will be automatically destroyed by the destructor
  50         //! \param stream Stream to load from
  51         file(std::basic_istream<Ch> &stream)
  52         {
  53             using namespace std;
  54
  55             // Load data and add terminating 0
  56             stream.unsetf(ios::skipws);
  57             m_data.assign(istreambuf_iterator<Ch>(stream), istreambuf_iterator<Ch>());
  58             if (stream.fail() || stream.bad())
  59                 throw runtime_error("error reading stream");
  60             m_data.push_back(0);
  61         }
  62
  63         //! Gets file data.
  64         //! \return Pointer to data of file.
  65         Ch *data()
  66         {
  67             return &m_data.front();
  68         }
  69
  70         //! Gets file data.
  71         //! \return Pointer to data of file.
  72         const Ch *data() const
  73         {
  74             return &m_data.front();
  75         }
  76
  77         //! Gets file data size.
  78         //! \return Size of file data, in characters.
  79         std::size_t size() const
  80         {
  81             return m_data.size();
  82         }
  83
  84     private:
  85
  86         std::vector<Ch> m_data;   // File data
  87
  88     };
  89
  90     //! Counts children of node. Time complexity is O(n).
  91     //! \return Number of children of node
  92     template<class Ch>
  93     inline std::size_t count_children(xml_node<Ch> *node)
  94     {
  95         xml_node<Ch> *child = node->first_node();
  96         std::size_t count = 0;
  97         while (child)
  98         {
  99             ++count;
 100             child = child->next_sibling();
 101         }
 102         return count;
 103     }
 104
 105     //! Counts attributes of node. Time complexity is O(n).
 106     //! \return Number of attributes of node
 107     template<class Ch>
 108     inline std::size_t count_attributes(xml_node<Ch> *node)
 109     {
 110         xml_attribute<Ch> *attr = node->first_attribute();
 111         std::size_t count = 0;
 112         while (attr)
 113         {
 114             ++count;
 115             attr = attr->next_attribute();
 116         }
 117         return count;
 118     }
 119
 120 }
 121
 122 #endif