src/FDM/JSBSim/input_output/FGXMLParse.cpp

   1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   2
   3  Header:       FGXMLParse.h
   4  Author:       Jon Berndt
   5  Date started: 08/20/2004
   6  Purpose:      Config file read-in class and XML parser
   7  Called by:    Various
   8
   9 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  10 INCLUDES
  11 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  12
  13 #include "FGXMLParse.h"
  14 #include <stdlib.h>
  15
  16 namespace JSBSim {
  17
  18 static const char *IdSrc = "$Id$";
  19 static const char *IdHdr = ID_XMLPARSE;
  20
  21 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  22 CLASS IMPLEMENTATION
  23 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  24
  25 #include "FGXMLParse.h"
  26
  27 using namespace std;
  28
  29 FGXMLParse::FGXMLParse(void)
  30 {
  31   first_element_read = false;
  32   current_element = document = 0L;
  33 }
  34
  35 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  36
  37 FGXMLParse::~FGXMLParse(void)
  38 {
  39   if (document) delete document;
  40 }
  41
  42 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  43
  44 void FGXMLParse::startXML(void)
  45 {
  46 }
  47
  48 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  49
  50 void FGXMLParse::reset(void)
  51 {
  52   if (document) delete document;
  53   first_element_read = false;
  54   current_element = document = 0L;
  55 }
  56
  57 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  58
  59 void FGXMLParse::endXML(void)
  60 {
  61   // At this point, document should equal current_element ?
  62 }
  63
  64 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  65
  66 void FGXMLParse::startElement (const char * name, const XMLAttributes &atts)
  67 {
  68   string Name(name);
  69   Element *temp_element;
  70
  71   working_string.erase();
  72
  73   if (!first_element_read) {
  74     document = new Element(Name);
  75     current_element = document;
  76     first_element_read = true;
  77   } else {
  78     temp_element = new Element(Name);
  79     temp_element->SetParent(current_element);
  80     current_element->AddChildElement(temp_element);
  81     current_element = temp_element;
  82   }
  83
  84   if (current_element == 0L) {
  85     cerr << "No current element read (no top-level element in XML file?)" << endl;
  86     exit (-1);
  87   }
  88
  89   for (int i=0; i<atts.size();i++) {
  90     current_element->AddAttribute(atts.getName(i), atts.getValue(i));
  91   }
  92 }
  93
  94 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  95
  96 void FGXMLParse::endElement (const char * name)
  97 {
  98   int size, pos;
  99   string local_work_string;
 100
 101   while (!working_string.empty()) {
 102      // clear leading newlines and spaces
 103     while (working_string[0] == '\n' || working_string[0] == ' ')
 104       working_string.erase(0,1);
 105
 106     // remove spaces (only) from end of string
 107     size = working_string.size();
 108     while (working_string[size-1] == ' ')
 109     {
 110       working_string.erase(size-1,1);
 111       size = working_string.size();
 112     }
 113
 114     if (!working_string.empty()) {
 115       pos = working_string.find("\n");
 116       if (pos != string::npos) local_work_string = working_string.substr(0,pos);
 117       else local_work_string = working_string;
 118       current_element->AddData(local_work_string);
 119       working_string.erase(0, pos);
 120     }
 121   }
 122
 123   current_element = current_element->GetParent();
 124 }
 125
 126 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 127
 128 void FGXMLParse::data (const char * s, int length)
 129 {
 130   working_string += string(s, length);
 131 }
 132
 133 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 134
 135 void FGXMLParse::pi (const char * target, const char * data)
 136 {
 137 }
 138
 139 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 140
 141 void FGXMLParse::warning (const char * message, int line, int column)
 142 {
 143   cerr << "Warning: " << message << " line: " << line << " column: " << column << endl;
 144 }
 145
 146 } // end namespace JSBSim