src/FDM/JSBSim/input_output/FGXMLParse.cpp

   1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   2
   3  Header:       FGXMLParse.cpp
   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  ------------- Copyright (C) 2001  Jon S. Berndt (jsb@hal-pc.org) -------------
  10
  11  This program is free software; you can redistribute it and/or modify it under
  12  the terms of the GNU Lesser General Public License as published by the Free Software
  13  Foundation; either version 2 of the License, or (at your option) any later
  14  version.
  15
  16  This program is distributed in the hope that it will be useful, but WITHOUT
  17  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  18  FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
  19  details.
  20
  21  You should have received a copy of the GNU Lesser General Public License along with
  22  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  23  Place - Suite 330, Boston, MA  02111-1307, USA.
  24
  25  Further information about the GNU Lesser General Public License can also be found on
  26  the world wide web at http://www.gnu.org.
  27
  28 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  29 INCLUDES
  30 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  31
  32 #include "FGXMLParse.h"
  33 #include <cstdlib>
  34
  35 namespace JSBSim {
  36
  37 static const char *IdSrc = "$Id$";
  38 static const char *IdHdr = ID_XMLPARSE;
  39
  40 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  41 CLASS IMPLEMENTATION
  42 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  43
  44 #include "FGXMLParse.h"
  45
  46 using namespace std;
  47
  48 FGXMLParse::FGXMLParse(void)
  49 {
  50   first_element_read = false;
  51   current_element = document = 0L;
  52 }
  53
  54 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  55
  56 FGXMLParse::~FGXMLParse(void)
  57 {
  58   delete document;
  59 }
  60
  61 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  62
  63 void FGXMLParse::startXML(void)
  64 {
  65 }
  66
  67 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  68
  69 void FGXMLParse::reset(void)
  70 {
  71   delete document;
  72   first_element_read = false;
  73   current_element = document = 0L;
  74 }
  75
  76 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  77
  78 void FGXMLParse::endXML(void)
  79 {
  80   // At this point, document should equal current_element ?
  81 }
  82
  83 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  84
  85 void FGXMLParse::startElement (const char * name, const XMLAttributes &atts)
  86 {
  87   string Name(name);
  88   Element *temp_element;
  89
  90   working_string.erase();
  91
  92   if (!first_element_read) {
  93     document = new Element(Name);
  94     current_element = document;
  95     first_element_read = true;
  96   } else {
  97     temp_element = new Element(Name);
  98     temp_element->SetParent(current_element);
  99     current_element->AddChildElement(temp_element);
 100     current_element = temp_element;
 101   }
 102
 103   if (current_element == 0L) {
 104     cerr << "No current element read (no top-level element in XML file?)" << endl;
 105     exit (-1);
 106   }
 107
 108   for (int i=0; i<atts.size();i++) {
 109     current_element->AddAttribute(atts.getName(i), atts.getValue(i));
 110   }
 111 }
 112
 113 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 114
 115 void FGXMLParse::endElement (const char * name)
 116 {
 117   string local_work_string;
 118
 119   while (!working_string.empty()) {
 120     // clear leading newlines and spaces
 121     string::size_type pos = working_string.find_first_not_of( " \n");
 122     if (pos > 0)
 123       working_string.erase(0, pos);
 124
 125     // remove spaces (only) from end of string
 126     pos = working_string.find_last_not_of( " ");
 127     if (pos != string::npos)
 128       working_string.erase( ++pos);
 129
 130     if (!working_string.empty()) {
 131       pos = working_string.find("\n");
 132       if (pos != string::npos) local_work_string = working_string.substr(0,pos);
 133       else local_work_string = working_string;
 134       current_element->AddData(local_work_string);
 135       working_string.erase(0, pos);
 136     }
 137   }
 138
 139   current_element = current_element->GetParent();
 140 }
 141
 142 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 143
 144 void FGXMLParse::data (const char * s, int length)
 145 {
 146   working_string += string(s, length);
 147 }
 148
 149 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 150
 151 void FGXMLParse::pi (const char * target, const char * data)
 152 {
 153 }
 154
 155 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 156
 157 void FGXMLParse::warning (const char * message, int line, int column)
 158 {
 159   cerr << "Warning: " << message << " line: " << line << " column: " << column << endl;
 160 }
 161
 162 } // end namespace JSBSim