/* The following code was generated by JFlex 1.4.1 on 3/27/07 11:18 AM */

package grammar;

import node.*;
import java.io.*;
import java_cup.runtime.*;


/**
 * This class is a scanner generated by 
 * <a href="http://www.jflex.de/">JFlex</a> 1.4.1
 * on 3/27/07 11:18 AM from the specification file
 * <tt>Source/grammar/Yylex.jflex</tt>
 */
public class Yylex {

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

  /** initial size of the lookahead buffer */
  private static final int ZZ_BUFFERSIZE = 16384;

  /** lexical states */
  public static final int YYINITIAL = 0;

  /** 
   * Translates characters to character classes
   */
  private static final char [] ZZ_CMAP = {
     0,  0,  0,  0,  0,  0,  0,  0,  0,  6,  2,  0,  0,  7,  0,  0, 
     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 
     6, 13,  3,  0,  0,  0, 12,  0, 20, 21, 18, 16,  9, 17,  0, 19, 
     4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  0,  8, 14, 10, 15,  0, 
     0,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5, 
     5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  0,  1,  0,  0,  0, 
     0, 38,  5,  5, 35, 31, 29,  5, 30, 26,  5,  5, 32,  5, 27, 36, 
    24,  5, 25, 33, 28, 37,  5, 34,  5,  5,  5, 22, 11, 23,  0,  0
  };

  /** 
   * Translates DFA states to action switch labels.
   */
  private static final int [] ZZ_ACTION = zzUnpackAction();

  private static final String ZZ_ACTION_PACKED_0 =
    "\1\0\1\1\1\2\1\1\1\3\1\4\1\5\1\2"+
    "\1\6\1\7\1\10\2\1\1\11\1\12\1\13\1\14"+
    "\1\15\1\16\1\17\1\20\1\21\1\22\1\23\7\4"+
    "\2\0\1\24\1\25\1\26\1\27\1\30\1\31\1\32"+
    "\1\0\1\5\1\4\1\33\2\4\1\34\4\4\1\35"+
    "\1\0\3\4\1\36\4\4\1\37\1\40\1\4\1\41"+
    "\1\4\1\42\1\43\1\44";

  private static int [] zzUnpackAction() {
    int [] result = new int[69];
    int offset = 0;
    offset = zzUnpackAction(ZZ_ACTION_PACKED_0, offset, result);
    return result;
  }

  private static int zzUnpackAction(String packed, int offset, int [] result) {
    int i = 0;       /* index in packed string  */
    int j = offset;  /* index in unpacked array */
    int l = packed.length();
    while (i < l) {
      int count = packed.charAt(i++);
      int value = packed.charAt(i++);
      do result[j++] = value; while (--count > 0);
    }
    return j;
  }


  /** 
   * Translates a state to a row index in the transition table
   */
  private static final int [] ZZ_ROWMAP = zzUnpackRowMap();

  private static final String ZZ_ROWMAP_PACKED_0 =
    "\0\0\0\47\0\47\0\116\0\165\0\234\0\47\0\303"+
    "\0\47\0\47\0\352\0\u0111\0\u0138\0\u015f\0\u0186\0\u01ad"+
    "\0\47\0\47\0\47\0\u01d4\0\47\0\47\0\47\0\47"+
    "\0\u01fb\0\u0222\0\u0249\0\u0270\0\u0297\0\u02be\0\u02e5\0\116"+
    "\0\u030c\0\47\0\47\0\47\0\47\0\47\0\47\0\47"+
    "\0\u0333\0\u035a\0\u0381\0\234\0\u03a8\0\u03cf\0\234\0\u03f6"+
    "\0\u041d\0\u0444\0\u046b\0\234\0\u0492\0\u04b9\0\u04e0\0\u0507"+
    "\0\234\0\u052e\0\u0555\0\u057c\0\u05a3\0\234\0\234\0\u05ca"+
    "\0\234\0\u05f1\0\234\0\234\0\234";

  private static int [] zzUnpackRowMap() {
    int [] result = new int[69];
    int offset = 0;
    offset = zzUnpackRowMap(ZZ_ROWMAP_PACKED_0, offset, result);
    return result;
  }

  private static int zzUnpackRowMap(String packed, int offset, int [] result) {
    int i = 0;  /* index in packed string  */
    int j = offset;  /* index in unpacked array */
    int l = packed.length();
    while (i < l) {
      int high = packed.charAt(i++) << 16;
      result[j++] = high | packed.charAt(i++);
    }
    return j;
  }

  /** 
   * The transition table of the DFA
   */
  private static final int [] ZZ_TRANS = zzUnpackTrans();

  private static final String ZZ_TRANS_PACKED_0 =
    "\2\2\1\3\1\4\1\5\1\6\1\7\1\10\1\11"+
    "\1\12\1\13\1\14\1\15\1\16\1\17\1\20\1\21"+
    "\1\22\1\23\1\24\1\25\1\26\1\27\1\30\1\31"+
    "\1\6\1\32\1\6\1\33\1\34\1\6\1\35\2\6"+
    "\1\36\1\37\3\6\47\0\1\40\1\41\1\40\1\42"+
    "\43\40\4\0\1\5\46\0\2\6\22\0\17\6\2\0"+
    "\1\3\56\0\1\43\47\0\1\44\47\0\1\45\44\0"+
    "\1\46\46\0\1\47\46\0\1\50\56\0\1\51\1\52"+
    "\27\0\2\6\22\0\1\6\1\53\15\6\4\0\2\6"+
    "\22\0\5\6\1\54\11\6\4\0\2\6\22\0\1\6"+
    "\1\55\4\6\1\56\5\6\1\57\2\6\4\0\2\6"+
    "\22\0\14\6\1\60\1\6\1\61\4\0\2\6\22\0"+
    "\10\6\1\62\6\6\4\0\2\6\22\0\6\6\1\63"+
    "\10\6\4\0\2\6\22\0\14\6\1\64\2\6\2\40"+
    "\1\0\44\40\22\51\1\65\24\51\2\52\1\0\4\52"+
    "\1\0\37\52\4\0\2\6\22\0\2\6\1\66\14\6"+
    "\4\0\2\6\22\0\15\6\1\67\1\6\4\0\2\6"+
    "\22\0\7\6\1\70\7\6\4\0\2\6\22\0\1\6"+
    "\1\71\15\6\4\0\2\6\22\0\10\6\1\72\6\6"+
    "\4\0\2\6\22\0\11\6\1\73\5\6\4\0\2\6"+
    "\22\0\2\6\1\74\14\6\22\51\1\65\1\7\23\51"+
    "\4\0\2\6\22\0\3\6\1\75\13\6\4\0\2\6"+
    "\22\0\7\6\1\76\7\6\4\0\2\6\22\0\3\6"+
    "\1\77\13\6\4\0\2\6\22\0\11\6\1\100\5\6"+
    "\4\0\2\6\22\0\7\6\1\101\7\6\4\0\2\6"+
    "\22\0\10\6\1\102\6\6\4\0\2\6\22\0\4\6"+
    "\1\103\12\6\4\0\2\6\22\0\7\6\1\104\7\6"+
    "\4\0\2\6\22\0\7\6\1\105\7\6";

  private static int [] zzUnpackTrans() {
    int [] result = new int[1560];
    int offset = 0;
    offset = zzUnpackTrans(ZZ_TRANS_PACKED_0, offset, result);
    return result;
  }

  private static int zzUnpackTrans(String packed, int offset, int [] result) {
    int i = 0;       /* index in packed string  */
    int j = offset;  /* index in unpacked array */
    int l = packed.length();
    while (i < l) {
      int count = packed.charAt(i++);
      int value = packed.charAt(i++);
      value--;
      do result[j++] = value; while (--count > 0);
    }
    return j;
  }


  /* error codes */
  private static final int ZZ_UNKNOWN_ERROR = 0;
  private static final int ZZ_NO_MATCH = 1;
  private static final int ZZ_PUSHBACK_2BIG = 2;

  /* error messages for the codes above */
  private static final String ZZ_ERROR_MSG[] = {
    "Unkown internal scanner error",
    "Error: could not match input",
    "Error: pushback value was too large"
  };

  /**
   * ZZ_ATTRIBUTE[aState] contains the attributes of state <code>aState</code>
   */
  private static final int [] ZZ_ATTRIBUTE = zzUnpackAttribute();

  private static final String ZZ_ATTRIBUTE_PACKED_0 =
    "\1\0\2\11\3\1\1\11\1\1\2\11\6\1\3\11"+
    "\1\1\4\11\7\1\2\0\7\11\1\0\13\1\1\0"+
    "\20\1";

  private static int [] zzUnpackAttribute() {
    int [] result = new int[69];
    int offset = 0;
    offset = zzUnpackAttribute(ZZ_ATTRIBUTE_PACKED_0, offset, result);
    return result;
  }

  private static int zzUnpackAttribute(String packed, int offset, int [] result) {
    int i = 0;       /* index in packed string  */
    int j = offset;  /* index in unpacked array */
    int l = packed.length();
    while (i < l) {
      int count = packed.charAt(i++);
      int value = packed.charAt(i++);
      do result[j++] = value; while (--count > 0);
    }
    return j;
  }

  /** the input device */
  private java.io.Reader zzReader;

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

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

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

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

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

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

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

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

  /** 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;

  /**
   * the number of characters from the last newline up to the start of the 
   * matched text
   */
  private int yycolumn;

  /** 
   * zzAtBOL == true <=> the scanner is currently at the beginning of a line
   */
  private boolean zzAtBOL = true;

  /** zzAtEOF == true <=> the scanner is at the EOF */
  private boolean zzAtEOF;

  /* user code: */
	private int lineNumber = 1;
	public int lineNumber() { return lineNumber; }
	
	public Symbol token( int tokenType ) {
		System.err.println( "Obtain token " 
			+ sym.terminal_name( tokenType ) + " \"" + yytext() + "\"" );
		return new Symbol( tokenType, yychar, 
			yychar + yytext().length(), yytext() );
		}



  /**
   * 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.
   */
  public Yylex(java.io.Reader in) {
    this.zzReader = in;
  }

  /**
   * Creates a new scanner.
   * There is also java.io.Reader version of this constructor.
   *
   * @param   in  the java.io.Inputstream to read input from.
   */
  public Yylex(java.io.InputStream in) {
    this(new java.io.InputStreamReader(in));
  }


  /**
   * Refills the input buffer.
   *
   * @return      <code>false</code>, iff there was new input.
   * 
   * @exception   java.io.IOException  if any I/O-Error occurs
   */
  private boolean zzRefill() throws java.io.IOException {

    /* first: make room (if you can) */
    if (zzStartRead > 0) {
      System.arraycopy(zzBuffer, zzStartRead,
                       zzBuffer, 0,
                       zzEndRead-zzStartRead);

      /* translate stored positions */
      zzEndRead-= zzStartRead;
      zzCurrentPos-= zzStartRead;
      zzMarkedPos-= zzStartRead;
      zzPushbackPos-= zzStartRead;
      zzStartRead = 0;
    }

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

    /* finally: fill the buffer with new input */
    int numRead = zzReader.read(zzBuffer, zzEndRead,
                                            zzBuffer.length-zzEndRead);

    if (numRead < 0) {
      return true;
    }
    else {
      zzEndRead+= numRead;
      return false;
    }
  }

    
  /**
   * Closes the input stream.
   */
  public final void yyclose() throws java.io.IOException {
    zzAtEOF = true;            /* indicate end of file */
    zzEndRead = zzStartRead;  /* invalidate buffer    */

    if (zzReader != null)
      zzReader.close();
  }


  /**
   * Resets the scanner to read from a new input stream.
   * Does not close the old reader.
   *
   * All internal variables are reset, the old input stream 
   * <b>cannot</b> be reused (internal buffer is discarded and lost).
   * Lexical state is set to <tt>ZZ_INITIAL</tt>.
   *
   * @param reader   the new input stream 
   */
  public final void yyreset(java.io.Reader reader) {
    zzReader = reader;
    zzAtBOL  = true;
    zzAtEOF  = false;
    zzEndRead = zzStartRead = 0;
    zzCurrentPos = zzMarkedPos = zzPushbackPos = 0;
    yyline = yychar = yycolumn = 0;
    zzLexicalState = YYINITIAL;
  }


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


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


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


  /**
   * Returns the character at position <tt>pos</tt> from the 
   * matched text. 
   * 
   * It is equivalent to yytext().charAt(pos), but faster
   *
   * @param pos the position of the character to fetch. 
   *            A value from 0 to yylength()-1.
   *
   * @return the character at position pos
   */
  public final char yycharat(int pos) {
    return zzBuffer[zzStartRead+pos];
  }


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


  /**
   * Reports an error that occured while scanning.
   *
   * In a wellformed scanner (no or only correct usage of 
   * yypushback(int) and a match-all fallback rule) this method 
   * will only be called with things that "Can't Possibly Happen".
   * If this method is called, something is seriously wrong
   * (e.g. a JFlex bug producing a faulty scanner etc.).
   *
   * Usual syntax/scanner level error handling should be done
   * in error fallback rules.
   *
   * @param   errorCode  the code of the errormessage to display
   */
  private void zzScanError(int errorCode) {
    String message;
    try {
      message = ZZ_ERROR_MSG[errorCode];
    }
    catch (ArrayIndexOutOfBoundsException e) {
      message = ZZ_ERROR_MSG[ZZ_UNKNOWN_ERROR];
    }

    throw new Error(message);
  } 


  /**
   * 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()!
   */
  public void yypushback(int number)  {
    if ( number > yylength() )
      zzScanError(ZZ_PUSHBACK_2BIG);

    zzMarkedPos -= number;
  }


  /**
   * 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   java.io.IOException  if any I/O-Error occurs
   */
  public Symbol yylex() throws java.io.IOException {
    int zzInput;
    int zzAction;

    // cached fields:
    int zzCurrentPosL;
    int zzMarkedPosL;
    int zzEndReadL = zzEndRead;
    char [] zzBufferL = zzBuffer;
    char [] zzCMapL = ZZ_CMAP;

    int [] zzTransL = ZZ_TRANS;
    int [] zzRowMapL = ZZ_ROWMAP;
    int [] zzAttrL = ZZ_ATTRIBUTE;

    while (true) {
      zzMarkedPosL = zzMarkedPos;

      yychar+= zzMarkedPosL-zzStartRead;

      zzAction = -1;

      zzCurrentPosL = zzCurrentPos = zzStartRead = zzMarkedPosL;
  
      zzState = zzLexicalState;


      zzForAction: {
        while (true) {
    
          if (zzCurrentPosL < zzEndReadL)
            zzInput = zzBufferL[zzCurrentPosL++];
          else if (zzAtEOF) {
            zzInput = YYEOF;
            break zzForAction;
          }
          else {
            // store back cached positions
            zzCurrentPos  = zzCurrentPosL;
            zzMarkedPos   = zzMarkedPosL;
            boolean eof = zzRefill();
            // get translated positions and possibly new buffer
            zzCurrentPosL  = zzCurrentPos;
            zzMarkedPosL   = zzMarkedPos;
            zzBufferL      = zzBuffer;
            zzEndReadL     = zzEndRead;
            if (eof) {
              zzInput = YYEOF;
              break zzForAction;
            }
            else {
              zzInput = zzBufferL[zzCurrentPosL++];
            }
          }
          int zzNext = zzTransL[ zzRowMapL[zzState] + zzCMapL[zzInput] ];
          if (zzNext == -1) break zzForAction;
          zzState = zzNext;

          int zzAttributes = zzAttrL[zzState];
          if ( (zzAttributes & 1) == 1 ) {
            zzAction = zzState;
            zzMarkedPosL = zzCurrentPosL;
            if ( (zzAttributes & 8) == 8 ) break zzForAction;
          }

        }
      }

      // store back cached position
      zzMarkedPos = zzMarkedPosL;

      switch (zzAction < 0 ? zzAction : ZZ_ACTION[zzAction]) {
        case 2: 
          { lineNumber++;
          }
        case 37: break;
        case 33: 
          { return token( sym.ELSE );
          }
        case 38: break;
        case 17: 
          { return token( sym.RIGHT );
          }
        case 39: break;
        case 1: 
          { return token( sym.LEXERROR );
          }
        case 40: break;
        case 15: 
          { return token( sym.DIVIDE );
          }
        case 41: break;
        case 16: 
          { return token( sym.LEFT );
          }
        case 42: break;
        case 3: 
          { return token( sym.INTVALUE );
          }
        case 43: break;
        case 21: 
          { return token( sym.EQ );
          }
        case 44: break;
        case 36: 
          { return token( sym.WHILE );
          }
        case 45: break;
        case 28: 
          { return token( sym.TO );
          }
        case 46: break;
        case 12: 
          { return token( sym.PLUS );
          }
        case 47: break;
        case 13: 
          { return token( sym.MINUS );
          }
        case 48: break;
        case 34: 
          { return token( sym.PRINT );
          }
        case 49: break;
        case 25: 
          { return token( sym.LE );
          }
        case 50: break;
        case 9: 
          { return token( sym.NOT );
          }
        case 51: break;
        case 23: 
          { return token( sym.AND );
          }
        case 52: break;
        case 30: 
          { return token( sym.FOR );
          }
        case 53: break;
        case 10: 
          { return token( sym.LT );
          }
        case 54: break;
        case 8: 
          { return token( sym.ASSIGN );
          }
        case 55: break;
        case 35: 
          { return token( sym.FALSE );
          }
        case 56: break;
        case 32: 
          { return token( sym.THEN );
          }
        case 57: break;
        case 27: 
          { return token( sym.IF );
          }
        case 58: break;
        case 31: 
          { return token( sym.TRUE );
          }
        case 59: break;
        case 29: 
          { return token( sym.DO );
          }
        case 60: break;
        case 4: 
          { return token( sym.IDENT );
          }
        case 61: break;
        case 18: 
          { return token( sym.LEFTCURLY );
          }
        case 62: break;
        case 20: 
          { return token( sym.STRINGVALUE );
          }
        case 63: break;
        case 26: 
          { return token( sym.GE );
          }
        case 64: break;
        case 14: 
          { return token( sym.TIMES );
          }
        case 65: break;
        case 6: 
          { return token( sym.SEMICOLON );
          }
        case 66: break;
        case 24: 
          { return token( sym.NE );
          }
        case 67: break;
        case 7: 
          { return token( sym.COMMA );
          }
        case 68: break;
        case 22: 
          { return token( sym.OR );
          }
        case 69: break;
        case 11: 
          { return token( sym.GT );
          }
        case 70: break;
        case 19: 
          { return token( sym.RIGHTCURLY );
          }
        case 71: break;
        case 5: 
          { 
          }
        case 72: break;
        default: 
          if (zzInput == YYEOF && zzStartRead == zzCurrentPos) {
            zzAtEOF = true;
              {
                return token( sym.EOF );
              }
          } 
          else {
            zzScanError(ZZ_NO_MATCH);
          }
      }
    }
  }


}