flightgear/src/FDM/UIUCModel/uiuc_parsefile.cpp

/**********************************************************************

 FILENAME:     uiuc_parsefile.cpp

----------------------------------------------------------------------

 DESCRIPTION:  Reads the input file and stores data in a list
               gets tokens from each line of the list
              
----------------------------------------------------------------------

 STATUS:       alpha version

----------------------------------------------------------------------

 REFERENCES:   

----------------------------------------------------------------------

 HISTORY:      01/30/2000   (BS) initial release
               09/19/2002   (MSS) appended zeros to lines w/ comments

----------------------------------------------------------------------

 AUTHOR(S):    Bipin Sehgal       <bsehgal@uiuc.edu>
               Michael Selig

----------------------------------------------------------------------

 VARIABLES:

----------------------------------------------------------------------

 INPUTS:       *

----------------------------------------------------------------------

 OUTPUTS:      *

----------------------------------------------------------------------

 CALLED BY:    *

----------------------------------------------------------------------

 CALLS TO:     *

----------------------------------------------------------------------

 COPYRIGHT:    (C) 2000 by Michael Selig

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
 USA or view http://www.gnu.org/copyleft/gpl.html.

**********************************************************************/


#include "uiuc_parsefile.h"


ParseFile :: ParseFile (const string fileName)
{
  file.open(fileName.c_str());
  readFile();
}

ParseFile :: ~ParseFile ()
{
  file.close();
}

void ParseFile :: removeComments(string& inputLine)
{
  string::size_type pos = inputLine.find_first_of(COMMENT);
  
  if (pos != inputLine.npos) // a "#" exists in the line 
  {
        if (inputLine.find_first_not_of(DELIMITERS) == pos)
	  {
	    inputLine = ""; // Complete line a comment
	  }
        else
          {
	    inputLine = inputLine.substr(0,pos); //Truncate the comment from the line
	    // append zeros to the input line after stripping off the comments
	    // mss added from Bipin email of 9/3/02
	    //	    inputLine += " 0 0 0 0 0 0";
	  }
  }
}


string ParseFile :: getToken(string inputLine, int tokenNo)
{
  string::size_type pos = 0;
  string::size_type pos1 = 0;
  int tokencounter = 0;

  while (tokencounter < tokenNo)
  {
    if ((pos1 == inputLine.npos) || (pos1 == -1) || (pos == -1) )
          return ""; //return an empty string if tokenNo exceeds the No of tokens in the line
        
        inputLine = inputLine.substr(pos1 , MAXLINE);
        pos = inputLine.find_first_not_of(DELIMITERS);
        pos1 = inputLine.find_first_of(DELIMITERS , pos);
        tokencounter ++;
  }

  if (pos1== -1 || pos == -1)
    return "";
  else
      return inputLine.substr(pos , pos1-pos); // return the desired token 
}


void ParseFile :: storeCommands(string inputLine)
{
  string::size_type pos;
  string::size_type pos1;
  // int wordlength;
  string line;
 
  inputLine += " ";  // To take care of the case when last character is not a blank
  pos = inputLine.find_first_not_of(DELIMITERS);
  pos1 = inputLine.find_first_of(DELIMITERS);
  
  while ((pos != inputLine.npos) && (pos1 != inputLine.npos))
  {
        line += inputLine.substr(pos , pos1 - pos)+ " ";
        inputLine = inputLine.substr(pos1, inputLine.size()- (pos1 - pos));
        pos = inputLine.find_first_not_of(DELIMITERS);
        pos1 = inputLine.find_first_of(DELIMITERS , pos);
  }
  
  line += inputLine; // Add the last word to the line
  commands.push_back(line);
}

//  void ParseFile :: readFile()
//  {
//    string line;

//    while (getline(file , line))
//    {
//     removeComments(line);
//     if (line.find_first_not_of(DELIMITERS) != line.npos) // strip off blank lines
//     {
//     	line += "     0 0 0 0 0";
//          storeCommands(line);
//     }
//    }
//  }

void ParseFile :: readFile()
{
  string line;

  while (getline(file , line))
    {
      removeComments(line);
      if (line.find_first_not_of(DELIMITERS) != line.npos) // strip off blank lines
	{
	  line += "     ";
	  // append some zeros, but this is doing something strange!
	  //	  	  line += "  0 0 0 0 0   ";
	  storeCommands(line);
	}
    }
}
stack ParseFile :: getCommands()
{
  return commands;
}

//end uiuc_parsefile.cpp