/*  Demo Recorder for MAEMO 5
*   Copyright (C) 2010 Dru Moore <usr@dru-id.co.uk>
*   This program is free software; you can redistribute it and/or modify
*   it under the terms of the GNU General Public License version 2,
*   or (at your option) any later version, 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.,
*   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
namespace IdWorks {
  
  public static class CdlParser : Object {
    
    const unichar CHAR_DLM = ',';
    const unichar CHAR_ESC = '\"';
    const unichar CHAR_EOL = '\n';
    
    public static string[] ParseLine(string line) {
      string[] values = {};
      
      bool in_esc = false;
      
      int pos = 0;
      StringBuilder buffer = new StringBuilder();
      unichar c;
      
      while ((c = line[pos]) != CHAR_EOL && !in_esc && pos < line.length) {
        switch(c) {
          case CHAR_ESC:
            // if we are already escaped add to buffer
            if (in_esc) {
              buffer.append_unichar(c);
              in_esc = false;
            }
            // else enter escape mode
            else {
              in_esc = true;
            }
            break;
          case CHAR_DLM:
            // add the buffer to list and clear the buffer
            values += buffer.str;
            buffer.truncate(0);
            break;
          default:
            // normal char to add to buffer
            buffer.append_unichar(c);
            break;
        }
        ++pos;
      }
      // check for data left floating over
      if (0 < buffer.len) values += buffer.str;
      buffer.truncate(0);
      buffer = null;
      
      return values;
    }
    
  }
  
}