159 lines
4.2 KiB
C++
159 lines
4.2 KiB
C++
/**********************************************************************
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FILENAME: uiuc_parsefile.cpp
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DESCRIPTION: Reads the input file and stores data in a list
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gets tokens from each line of the list
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STATUS: alpha version
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REFERENCES:
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HISTORY: 01/30/2000 initial release
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AUTHOR(S): Bipin Sehgal <bsehgal@uiuc.edu>
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VARIABLES:
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INPUTS: *
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OUTPUTS: *
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CALLED BY: *
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CALLS TO: *
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COPYRIGHT: (C) 2000 by Michael Selig
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA or view http://www.gnu.org/copyleft/gpl.html.
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**********************************************************************/
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#include "uiuc_parsefile.h"
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ParseFile :: ParseFile (const string fileName)
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{
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file.open(fileName.c_str());
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readFile();
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}
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ParseFile :: ~ParseFile ()
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{
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file.close();
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}
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void ParseFile :: removeComments(string& inputLine)
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{
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int pos = inputLine.find_first_of(COMMENT);
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if (pos != inputLine.npos) // a "#" exists in the line
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{
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if (inputLine.find_first_not_of(DELIMITERS) == pos)
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inputLine = ""; // Complete line a comment
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else
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inputLine = inputLine.substr(0,pos); //Truncate the comment from the line
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}
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}
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string ParseFile :: getToken(string inputLine, int tokenNo)
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{
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int pos = 0;
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int pos1 = 0;
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int tokencounter = 0;
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while (tokencounter < tokenNo)
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{
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if ((pos1 == inputLine.npos) || (pos1 == -1) || (pos == -1) )
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return ""; //return an empty string if tokenNo exceeds the No of tokens in the line
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inputLine = inputLine.substr(pos1 , MAXLINE);
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pos = inputLine.find_first_not_of(DELIMITERS);
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pos1 = inputLine.find_first_of(DELIMITERS , pos);
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tokencounter ++;
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}
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if (pos1== -1 || pos == -1)
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return "";
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else
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return inputLine.substr(pos , pos1-pos); // return the desired token
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}
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void ParseFile :: storeCommands(string inputLine)
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{
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int pos;
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int pos1;
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// int wordlength;
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string line;
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inputLine += " "; // To take care of the case when last character is not a blank
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pos = inputLine.find_first_not_of(DELIMITERS);
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pos1 = inputLine.find_first_of(DELIMITERS);
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while ((pos != inputLine.npos) && (pos1 != inputLine.npos))
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{
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line += inputLine.substr(pos , pos1 - pos)+ " ";
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inputLine = inputLine.substr(pos1, inputLine.size()- (pos1 - pos));
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pos = inputLine.find_first_not_of(DELIMITERS);
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pos1 = inputLine.find_first_of(DELIMITERS , pos);
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}
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line += inputLine; // Add the last word to the line
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commands.push_back(line);
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}
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void ParseFile :: readFile()
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{
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string line;
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while (getline(file , line))
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{
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removeComments(line);
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if (line.find_first_not_of(DELIMITERS) != line.npos) // strip off blank lines
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storeCommands(line);
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}
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}
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stack ParseFile :: getCommands()
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{
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return commands;
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}
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//end uiuc_parsefile.cpp
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