src/FDM/JSBSim/FGConfigFile.cpp

   1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   2
   3  Header:       FGConfigFile.h
   4  Author:       Jon Berndt
   5  Date started: 03/29/00
   6  Purpose:      Config file read-in class
   7  Called by:    FGAircraft
   8
   9 FUNCTIONAL DESCRIPTION
  10 --------------------------------------------------------------------------------
  11
  12 HISTORY
  13 --------------------------------------------------------------------------------
  14 03/16/2000 JSB  Created
  15
  16 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  17 INCLUDES
  18 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  19
  20 #include "FGConfigFile.h"
  21 #include <stdlib.h>
  22 #include <math.h>
  23
  24 static const char *IdSrc = "$Id$";
  25 static const char *IdHdr = ID_CONFIGFILE;
  26
  27 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  28 CLASS IMPLEMENTATION
  29 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  30
  31 FGConfigFile::FGConfigFile(string cfgFileName)
  32 {
  33 #if defined ( sgi ) && !defined( __GNUC__ )
  34   cfgfile.open(cfgFileName.c_str(), ios::in );
  35 #else
  36   cfgfile.open(cfgFileName.c_str(), ios::in | ios::binary );
  37 #endif
  38   CommentsOn = false;
  39   CurrentIndex = 0;
  40   Opened = true;
  41 #if defined ( sgi ) && !defined( __GNUC__ )
  42    if (!cfgfile.fail() && !cfgfile.eof())  GetNextConfigLine();
  43 #else
  44   if (cfgfile.is_open()) GetNextConfigLine();
  45 #endif
  46   else Opened = false;
  47
  48   if (debug_lvl & 2) cout << "Instantiated: FGConfigFile" << endl;
  49 }
  50
  51 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  52
  53 FGConfigFile::~FGConfigFile()
  54 {
  55   cfgfile.close();
  56   if (debug_lvl & 2) cout << "Destroyed:    FGConfigFile" << endl;
  57 }
  58
  59 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  60
  61 string FGConfigFile::GetNextConfigLine(void)
  62 {
  63   int deblank;
  64
  65   do {
  66     CurrentLine = GetLine();
  67     if (CurrentLine.find("<!--") != CurrentLine.npos) {
  68       CommentsOn = true;
  69       CommentString = "";
  70       if (CurrentLine.find("<!--") != CurrentLine.npos)
  71         CurrentLine.erase(CurrentLine.find("<!--"),4);
  72       while((deblank = CurrentLine.find(" ")) != CurrentLine.npos) CurrentLine.erase(deblank,1);
  73       if (CurrentLine.size() <= 2) CurrentLine = "";
  74     }
  75
  76     if (CurrentLine.find("-->") != CurrentLine.npos) {
  77       CommentsOn = false;
  78
  79       if (CurrentLine.find("-->") != CurrentLine.npos)
  80         CurrentLine.erase(CurrentLine.find("-->"),4);
  81
  82       while((deblank = CurrentLine.find(" ")) != CurrentLine.npos) CurrentLine.erase(deblank,1);
  83       if (CurrentLine.size() <= 2) CurrentLine = "";
  84
  85       CommentString += CurrentLine;
  86       GetNextConfigLine();
  87     }
  88
  89     if (CommentsOn) CommentString += CurrentLine + "\r\n";
  90
  91   } while (CommentsOn);
  92
  93   if (CurrentLine.length() == 0) GetNextConfigLine();
  94   CurrentIndex = 0;
  95   return CurrentLine;
  96 }
  97
  98 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  99
 100 string FGConfigFile::GetCommentString(void)
 101 {
 102     return CommentString;
 103 }
 104
 105 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 106
 107 string FGConfigFile::GetValue(string val)
 108 {
 109   unsigned int pos, p1, p2, ptest;
 110
 111   if (val == "") {    // this call is to return the tag value
 112     pos = CurrentLine.find("<");
 113     if (pos != CurrentLine.npos) { // beginning brace found "<"
 114       p1 = CurrentLine.find_first_not_of(" ",pos+1);
 115       if (p1 != CurrentLine.npos) { // found first character of tag
 116         p2 = CurrentLine.find_first_of(" >",p1+1);
 117         if (p2 == CurrentLine.npos) p2 = p1+1;
 118         return CurrentLine.substr(p1,p2-p1);
 119       }
 120     } else {   // beginning brace "<" not found; this is a regular data line
 121       pos = CurrentLine.find_first_not_of(" ");
 122       if (pos != CurrentLine.npos) {  // first character in line found
 123         p2 = CurrentLine.find_first_of(" ",pos+1);
 124         if (p2 != CurrentLine.npos) {
 125           return CurrentLine.substr(pos,p2-pos);
 126         } else {
 127           return CurrentLine.substr(pos,CurrentLine.length()-pos);
 128         }
 129       }
 130     }
 131   } else { // return a value for a specific tag
 132     pos = CurrentLine.find(val);
 133     if (pos != CurrentLine.npos) {
 134       pos = CurrentLine.find("=",pos);
 135       if (pos != CurrentLine.npos) {
 136         ptest = CurrentLine.find_first_not_of(" ",pos+1);
 137         if (ptest != CurrentLine.npos) {
 138           p1 = ptest + 1;
 139           if (CurrentLine[ptest] == '"') { // quoted
 140             p2 = CurrentLine.find_first_of("\"",p1);
 141           } else { // not quoted
 142             p2 = CurrentLine.find_first_of(" ",p1);
 143           }
 144           if (p2 != CurrentLine.npos) {
 145             return CurrentLine.substr(p1,p2-p1);
 146           }
 147         }
 148       } else {   // "=" not found
 149         pos = CurrentLine.find(val);
 150         pos = CurrentLine.find_first_of(" ",pos+1);
 151         ptest = CurrentLine.find_first_not_of(" ",pos+1);
 152         if (ptest != CurrentLine.npos) {
 153           if (CurrentLine[ptest] == '"') { // quoted
 154             p1 = ptest + 1;
 155             p2 = CurrentLine.find_first_of("\"",p1);
 156           } else { // not quoted
 157             p1 = ptest;
 158             p2 = CurrentLine.find_first_of(" ",p1);
 159           }
 160           if (p2 != CurrentLine.npos) {
 161             return CurrentLine.substr(p1,p2-p1);
 162           } else {
 163             p2 = CurrentLine.length();
 164             return CurrentLine.substr(p1,p2-p1);
 165           }
 166         }
 167       }
 168     }
 169   }
 170
 171   return string("");
 172 }
 173
 174 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 175
 176 string FGConfigFile::GetValue(void)
 177 {
 178   return GetValue("");
 179 }
 180
 181 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 182
 183 string FGConfigFile::GetLine(void)
 184 {
 185   string scratch = "";
 186   int test;
 187
 188   while ((test = cfgfile.get()) != EOF) {
 189     if (test >= 0x20) {
 190       scratch += (char)test;
 191     } else {
 192       if ((test = cfgfile.get()) != EOF) {
 193 #if defined ( sgi ) && !defined( __GNUC__ )
 194         if (test >= 0x20) cfgfile.putback(test);
 195 #else
 196         if (test >= 0x20) cfgfile.unget();
 197 #endif
 198         break;
 199       }
 200     }
 201   }
 202   if (cfgfile.eof()) return string("EOF");
 203   return scratch;
 204 }
 205
 206 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 207
 208 FGConfigFile& FGConfigFile::operator>>(double& val)
 209 {
 210   unsigned int pos, end;
 211
 212   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 213   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 214   end = CurrentLine.find_first_of(", ",pos+1);
 215   if (end == CurrentLine.npos) end = CurrentLine.length();
 216   string str = CurrentLine.substr(pos, end - pos);
 217   val = strtod(str.c_str(),NULL);
 218   CurrentIndex = end+1;
 219   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 220   return *this;
 221 }
 222
 223 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 224
 225 FGConfigFile& FGConfigFile::operator>>(float& val)
 226 {
 227   unsigned int pos, end;
 228
 229   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 230   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 231   end = CurrentLine.find_first_of(", ",pos+1);
 232   if (end == CurrentLine.npos) end = CurrentLine.length();
 233   string str = CurrentLine.substr(pos, end - pos);
 234   val = strtod(str.c_str(),NULL);
 235   CurrentIndex = end+1;
 236   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 237   return *this;
 238 }
 239
 240 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 241
 242 FGConfigFile& FGConfigFile::operator>>(int& val)
 243 {
 244   unsigned int pos, end;
 245
 246   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 247   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 248   end = CurrentLine.find_first_of(", ",pos+1);
 249   if (end == CurrentLine.npos) end = CurrentLine.length();
 250   string str = CurrentLine.substr(pos, end - pos);
 251   val = atoi(str.c_str());
 252   CurrentIndex = end+1;
 253   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 254   return *this;
 255 }
 256
 257 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 258
 259 FGConfigFile& FGConfigFile::operator>>(eParam& val)
 260 {
 261   unsigned int pos, end;
 262
 263   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 264   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 265   end = CurrentLine.find_first_of(", ",pos+1);
 266   if (end == CurrentLine.npos) end = CurrentLine.length();
 267   string str = CurrentLine.substr(pos, end - pos);
 268   val = (eParam)atoi(str.c_str());
 269   CurrentIndex = end+1;
 270   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 271   return *this;
 272 }
 273
 274 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 275
 276 FGConfigFile& FGConfigFile::operator>>(string& str)
 277 {
 278   unsigned int pos, end;
 279
 280   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 281   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 282   end = CurrentLine.find_first_of(", ",pos+1);
 283   if (end == CurrentLine.npos) end = CurrentLine.length();
 284   str = CurrentLine.substr(pos, end - pos);
 285   CurrentIndex = end+1;
 286   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 287   return *this;
 288 }
 289
 290 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 291
 292 void FGConfigFile::ResetLineIndexToZero(void)
 293 {
 294   CurrentIndex = 0;
 295 }
 296
 297 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 298
 299 void FGConfigFile::Debug(void)
 300 {
 301     //TODO: Add your source code here
 302 }
 303