content: /*
  * Conditions Of Use
  *
  * This software was developed by employees of the National Institute of
  * Standards and Technology (NIST), an agency of the Federal Government.
  * Pursuant to title 15 Untied States Code Section 105, works of NIST
  * employees are not subject to copyright protection in the United States
  * and are considered to be in the public domain.  As a result, a formal
  * license is not needed to use the software.
  *
  * This software is provided by NIST as a service and is expressly
  * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
  * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
  * AND DATA ACCURACY.  NIST does not warrant or make any representations
  * regarding the use of the software or the results thereof, including but
  * not limited to the correctness, accuracy, reliability or usefulness of
  * the software.
  *
  * Permission to use this software is contingent upon your acceptance
  * of the terms of this agreement
  *
  * .
  *
  */
  package gov2.nist.core;
  
  import java.text.ParseException;
  
  /** Generic parser class.
  * All parsers inherit this class.
  *
  *@version 1.2
  *
  *@author M. Ranganathan   <br/>
  *
  *
  *
  */
  public abstract class ParserCore {
      public static final boolean debug = Debug.parserDebug;
  
      static int nesting_level;
  
      protected LexerCore lexer;
  
  
      protected NameValue nameValue(char separator) throws ParseException  {
          if (debug) dbg_enter("nameValue");
          try {
  
          lexer.match(LexerCore.ID);
          Token name = lexer.getNextToken();
          // eat white space.
          lexer.SPorHT();
          try {
  
  
                  boolean quoted = false;
  
              char la = lexer.lookAhead(0);
  
              if (la == separator ) {
                  lexer.consume(1);
                  lexer.SPorHT();
                  String str = null;
                  boolean isFlag = false;
                  if (lexer.lookAhead(0) == '\"')  {
                       str = lexer.quotedString();
                       quoted = true;
                  } else {
                     lexer.match(LexerCore.ID);
                     Token value = lexer.getNextToken();
                     str = value.tokenValue;
  
                     // JvB: flag parameters must be empty string!
                     if (str==null) {
                         str = "";
                         isFlag = true;
                     }
                  }
                  NameValue nv = new NameValue(name.tokenValue,str,isFlag);
                  if (quoted) nv.setQuotedValue();
                  return nv;
              }  else {
                  // JvB: flag parameters must be empty string!
                  return new NameValue(name.tokenValue,"",true);
              }
          } catch (ParseException ex) {
              return new NameValue(name.tokenValue,null,false);
          }
  
          } finally {
              if (debug) dbg_leave("nameValue");
          }
  
  
      }
  
      protected  void dbg_enter(String rule) {
          StringBuffer stringBuffer = new StringBuffer();
          for (int i = 0; i < nesting_level ; i++)
              stringBuffer.append(">");
  
          if (debug)  {
              System.out.println(
                  stringBuffer + rule +
                  "\nlexer buffer = \n" +
                  lexer.getRest());
          }
          nesting_level++;
      }
  
      protected void dbg_leave(String rule) {
          StringBuffer stringBuffer = new StringBuffer();
          for (int i = 0; i < nesting_level ; i++)
              stringBuffer.append("<");
  
          if (debug)  {
              System.out.println(
                  stringBuffer +
                  rule +
                  "\nlexer buffer = \n" +
                  lexer.getRest());
          }
          nesting_level --;
      }
  
      protected NameValue nameValue() throws ParseException  {
          return nameValue('=');
      }
  
  
  
      protected void peekLine(String rule) {
          if (debug) {
              Debug.println(rule +" " + lexer.peekLine());
          }
      }
  }
  
  
  