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 extern short debug_lvl;
  28
  29 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  30 CLASS IMPLEMENTATION
  31 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  32
  33 FGConfigFile::FGConfigFile(string cfgFileName)
  34 {
  35   cfgfile.open(cfgFileName.c_str());
  36   CommentsOn = false;
  37   CurrentIndex = 0;
  38   Opened = true;
  39   if (cfgfile.is_open()) GetNextConfigLine();
  40   else Opened = false;
  41
  42   if (debug_lvl & 2) cout << "Instantiated: FGConfigFile" << endl;
  43 }
  44
  45 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  46
  47 FGConfigFile::~FGConfigFile()
  48 {
  49   cfgfile.close();
  50   if (debug_lvl & 2) cout << "Destroyed:    FGConfigFile" << endl;
  51 }
  52
  53 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  54
  55 string FGConfigFile::GetNextConfigLine(void)
  56 {
  57   do {
  58     CurrentLine = GetLine();
  59     if ((CurrentLine.find("<COMMENT>") != CurrentLine.npos) ||
  60         (CurrentLine.find("<!--") != CurrentLine.npos)) CommentsOn = true;
  61     if ((CurrentLine.find("</COMMENT>") != CurrentLine.npos) ||
  62         (CurrentLine.find("-->") != CurrentLine.npos)) {
  63       CommentsOn = false;
  64       GetNextConfigLine();
  65     }
  66   } while (IsCommentLine());
  67   if (CurrentLine.length() == 0) GetNextConfigLine();
  68   CurrentIndex = 0;
  69   return CurrentLine;
  70 }
  71
  72 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  73
  74 string FGConfigFile::GetValue(string val)
  75 {
  76   unsigned int pos, p1, p2, ptest;
  77
  78   if (val == "") {    // this call is to return the tag value
  79     pos = CurrentLine.find("<");
  80     if (pos != CurrentLine.npos) { // beginning brace found "<"
  81       p1 = CurrentLine.find_first_not_of(" ",pos+1);
  82       if (p1 != CurrentLine.npos) { // found first character of tag
  83         p2 = CurrentLine.find_first_of(" >",p1+1);
  84         if (p2 == CurrentLine.npos) p2 = p1+1;
  85         return CurrentLine.substr(p1,p2-p1);
  86       }
  87     } else {   // beginning brace "<" not found; this is a regular data line
  88       pos = CurrentLine.find_first_not_of(" ");
  89       if (pos != CurrentLine.npos) {  // first character in line found
  90         p2 = CurrentLine.find_first_of(" ",pos+1);
  91         if (p2 != CurrentLine.npos) {
  92           return CurrentLine.substr(pos,p2-pos);
  93         } else {
  94           return CurrentLine.substr(pos,CurrentLine.length()-pos);
  95         }
  96       }
  97     }
  98   } else { // return a value for a specific tag
  99     pos = CurrentLine.find(val);
 100     if (pos != CurrentLine.npos) {
 101       pos = CurrentLine.find("=",pos);
 102       if (pos != CurrentLine.npos) {
 103         ptest = CurrentLine.find_first_not_of(" ",pos+1);
 104         if (ptest != CurrentLine.npos) {
 105           p1 = ptest + 1;
 106           if (CurrentLine[ptest] == '"') { // quoted
 107             p2 = CurrentLine.find_first_of("\"",p1);
 108           } else { // not quoted
 109             p2 = CurrentLine.find_first_of(" ",p1);
 110           }
 111           if (p2 != CurrentLine.npos) {
 112             return CurrentLine.substr(p1,p2-p1);
 113           }
 114         }
 115       } else {   // "=" not found
 116         pos = CurrentLine.find(val);
 117         pos = CurrentLine.find_first_of(" ",pos+1);
 118         ptest = CurrentLine.find_first_not_of(" ",pos+1);
 119         if (ptest != CurrentLine.npos) {
 120           if (CurrentLine[ptest] == '"') { // quoted
 121             p1 = ptest + 1;
 122             p2 = CurrentLine.find_first_of("\"",p1);
 123           } else { // not quoted
 124             p1 = ptest;
 125             p2 = CurrentLine.find_first_of(" ",p1);
 126           }
 127           if (p2 != CurrentLine.npos) {
 128             return CurrentLine.substr(p1,p2-p1);
 129           } else {
 130             p2 = CurrentLine.length();
 131             return CurrentLine.substr(p1,p2-p1);
 132           }
 133         }
 134       }
 135     }
 136   }
 137
 138   return string("");
 139 }
 140
 141 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 142
 143 string FGConfigFile::GetValue(void)
 144 {
 145   return GetValue("");
 146 }
 147
 148 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 149
 150 bool FGConfigFile::IsCommentLine(void)
 151 {
 152   if (CurrentLine[0] == '/' && CurrentLine[1] == '/') return true;
 153   if (CommentsOn) return true;
 154
 155   return false;
 156 }
 157
 158 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 159
 160 string FGConfigFile::GetLine(void)
 161 {
 162   string scratch = "";
 163   int test;
 164
 165   while ((test = cfgfile.get()) != EOF) {
 166     if (test >= 0x20) {
 167       scratch += (char)test;
 168     } else {
 169       if ((test = cfgfile.get()) != EOF) {
 170         if (test >= 0x20) cfgfile.unget();
 171         break;
 172       }
 173     }
 174   }
 175   if (cfgfile.eof()) return string("EOF");
 176   return scratch;
 177 }
 178
 179 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 180
 181 FGConfigFile& FGConfigFile::operator>>(double& val)
 182 {
 183   unsigned int pos, end;
 184
 185   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 186   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 187   end = CurrentLine.find_first_of(", ",pos+1);
 188   if (end == CurrentLine.npos) end = CurrentLine.length();
 189   string str = CurrentLine.substr(pos, end - pos);
 190   val = strtod(str.c_str(),NULL);
 191   CurrentIndex = end+1;
 192   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 193   return *this;
 194 }
 195
 196 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 197
 198 FGConfigFile& FGConfigFile::operator>>(float& val)
 199 {
 200   unsigned int pos, end;
 201
 202   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 203   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 204   end = CurrentLine.find_first_of(", ",pos+1);
 205   if (end == CurrentLine.npos) end = CurrentLine.length();
 206   string str = CurrentLine.substr(pos, end - pos);
 207   val = strtod(str.c_str(),NULL);
 208   CurrentIndex = end+1;
 209   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 210   return *this;
 211 }
 212
 213 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 214
 215 FGConfigFile& FGConfigFile::operator>>(int& val)
 216 {
 217   unsigned int pos, end;
 218
 219   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 220   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 221   end = CurrentLine.find_first_of(", ",pos+1);
 222   if (end == CurrentLine.npos) end = CurrentLine.length();
 223   string str = CurrentLine.substr(pos, end - pos);
 224   val = atoi(str.c_str());
 225   CurrentIndex = end+1;
 226   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 227   return *this;
 228 }
 229
 230 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 231
 232 FGConfigFile& FGConfigFile::operator>>(eParam& val)
 233 {
 234   unsigned int pos, end;
 235
 236   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 237   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 238   end = CurrentLine.find_first_of(", ",pos+1);
 239   if (end == CurrentLine.npos) end = CurrentLine.length();
 240   string str = CurrentLine.substr(pos, end - pos);
 241   val = (eParam)atoi(str.c_str());
 242   CurrentIndex = end+1;
 243   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 244   return *this;
 245 }
 246
 247 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 248
 249 FGConfigFile& FGConfigFile::operator>>(string& str)
 250 {
 251   unsigned int pos, end;
 252
 253   pos = CurrentLine.find_first_not_of(", ",CurrentIndex);
 254   if (pos == CurrentLine.npos) pos = CurrentLine.length();
 255   end = CurrentLine.find_first_of(", ",pos+1);
 256   if (end == CurrentLine.npos) end = CurrentLine.length();
 257   str = CurrentLine.substr(pos, end - pos);
 258   CurrentIndex = end+1;
 259   if (CurrentIndex >= CurrentLine.length()) GetNextConfigLine();
 260   return *this;
 261 }
 262
 263 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 264
 265 void FGConfigFile::ResetLineIndexToZero(void)
 266 {
 267   CurrentIndex = 0;
 268 }
 269
 270 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 271
 272 void FGConfigFile::Debug(void)
 273 {
 274     //TODO: Add your source code here
 275 }
 276