path: root/bundles/org.eclipse.wst.sse.core/DevTimeSupport/HeadParsers/XMLHeadTokenizer/oldXMLHeadTokenizer.skeleton

  /** this character denotes the end of file */
  final public static int YYEOF = -1;

  /** lexical states */
---  lexical states, charmap

  /* error codes */
  final private static int YY_UNKNOWN_ERROR = 0;
  final private static int YY_ILLEGAL_STATE = 1;
  final private static int YY_NO_MATCH = 2;
  final private static int YY_PUSHBACK_2BIG = 3;

  /* error messages for the codes above */
  final private static String YY_ERROR_MSG[] = {
    "Unkown internal scanner error",		//$NON-NLS-1$
    "Internal error: unknown state",		//$NON-NLS-1$
    "Error: could not match input",		//$NON-NLS-1$
    "Error: pushback value was too large"	//$NON-NLS-1$
  };

--- isFinal list
  /** the input device */
  private java.io.Reader yy_reader;

  /** the current state of the DFA */
  private int yy_state;

  /** the current lexical state */
  private int yy_lexical_state = YYINITIAL;

  /** this buffer contains the current text to be matched and is
      the source of the yytext() string */
  private char yy_buffer[] = new char[16384];

  /** the textposition at the last accepting state */
  private int yy_markedPos;

  /** the textposition at the last state to be included in yytext */
  private int yy_pushbackPos;

  /** the current text position in the buffer */
  private int yy_currentPos;

  /** startRead marks the beginning of the yytext() string in the buffer */
  private int yy_startRead;

  /** endRead marks the last character in the buffer, that has been read
      from input */
  private int yy_endRead;

  /** number of newlines encountered up to the start of the matched text */
  private int yyline;

  /** the number of characters up to the start of the matched text */
  private int yychar;

  
  /** yy_atEOF == true <=> the scanner has returned a value for EOF */
  private boolean yy_atEOF;

	// state stack for handling embedded regions
	private IntStack fStateStack = new IntStack();


--- user class code

  /**
   * Creates a new scanner
   * There is also a java.io.InputStream version of this constructor.
   *
   * @param   in  the java.io.Reader to read input from.
   */
--- constructor declaration


  /**
   * Gets the next input character.
   *
   * @return      the next character of the input stream, EOF if the
   *              end of the stream is reached.
   * @exception   IOException  if any I/O-Error occurs
   */
  private int yy_advance() throws java.io.IOException {

    /* standard case */
    if (yy_currentPos < yy_endRead) return yy_buffer[yy_currentPos++];

    /* if the eof is reached, we don't need to work hard */ 
    if (yy_atEOF) return YYEOF;

    /* otherwise: need to refill the buffer */

    /* first: make room (if you can) */
    if (yy_startRead > 0) {
      System.arraycopy(yy_buffer, yy_startRead, 
                       yy_buffer, 0, 
                       yy_endRead-yy_startRead);

      /* translate stored positions */
      yy_endRead-= yy_startRead;
      yy_currentPos-= yy_startRead;
      yy_markedPos-= yy_startRead;
      yy_pushbackPos-= yy_startRead;
      yy_startRead = 0;
    }

    /* is the buffer big enough? */
    if (yy_currentPos >= yy_buffer.length) {
      /* if not: blow it up */
      char newBuffer[] = new char[yy_currentPos*2];
      System.arraycopy(yy_buffer, 0, newBuffer, 0, yy_buffer.length);
      yy_buffer = newBuffer;
    }

    /* finally: fill the buffer with new input */
    int numRead = yy_reader.read(yy_buffer, yy_endRead, 
                                            yy_buffer.length-yy_endRead);

    if ( numRead == -1 ) return YYEOF;

    yy_endRead+= numRead;

    return yy_buffer[yy_currentPos++];
  }

    
  /**
   * Closes the input stream.
   */
  final public void yyclose() throws java.io.IOException {
    yy_atEOF = true;            /* indicate end of file */
    yy_endRead = yy_startRead;  /* invalidate buffer    */
    yy_reader.close();
  }


  /**
   * Returns the current lexical state.
   */
  final public int yystate() {
    return yy_lexical_state;
  }

  /**
   * Enters a new lexical state
   *
   * @param newState the new lexical state
   */
  final public void yybegin(int newState) {
    yy_lexical_state = newState;
  }


  /**
   * Returns the text matched by the current regular expression.
   */
  final public String yytext() {
    return new String( yy_buffer, yy_startRead, yy_markedPos-yy_startRead );
  }

  /**
   * Returns the length of the matched text region.
   */
  final public int yylength() {
    return yy_markedPos-yy_startRead;
  }


  /**
   * Reports an error that occured while scanning - from the SED JFlex skeleton
   *
   * @param   errorCode  the code of the errormessage to display
   */
  private void yy_ScanError(int errorCode) {
    try {
      //Logger.log(Logger.ERROR, YY_ERROR_MSG[errorCode]);
	System.out.println("ScanError: " + errorCode + ": " + YY_ERROR_MSG[errorCode]);
    }
    catch (ArrayIndexOutOfBoundsException e) {
      //Logger.log(Logger.ERROR, YY_ERROR_MSG[YY_UNKNOWN_ERROR]);
	System.out.println("ScanError: " + errorCode + ": " + YY_ERROR_MSG[YY_UNKNOWN_ERROR]);
   }
    // DO NOT EXIT the VM on an error
    // System.exit(1);
  } 


  /**
   * Pushes the specified amount of characters back into the input stream.
   *
   * They will be read again by then next call of the scanning method
   *
   * @param number  the number of characters to be read again.
   *                This number must not be greater than yylength()!
   */
  private void yypushback(int number) {
    if ( number > yylength() )
      yy_ScanError(YY_PUSHBACK_2BIG);

    yy_markedPos -= number;
  }


--- yy_doEof
  /**
   * Resumes scanning until the next regular expression is matched,
   * the end of input is encountered or an I/O-Error occurs.
   *
   * @return      the next token
   * @exception   IOException  if any I/O-Error occurs
   */
--- yylex declaration
    int yy_input;
    int yy_action;

--- local declarations

    while (true) {

--- start admin (line, char, col count)
      yy_action = -1;

      yy_currentPos = yy_startRead = yy_markedPos;

--- start admin (lexstate etc)

      yy_forAction: {
        while (true) {
    
          yy_input = yy_advance();

          if ( yy_input == YYEOF ) break yy_forAction;

--- line, col, char count, next transition, isFinal action
            yy_action = yy_state; 
            yy_markedPos = yy_currentPos; 
--- line count update
          }

        }
      }

--- char count update

      switch (yy_action) {    

--- actions
        default: 
          if (yy_input == YYEOF && yy_startRead == yy_currentPos) {
            yy_atEOF = true;
--- eofvalue
          } 
          else {
--- no match
          }
      }
    }
  }    

--- main

}