yylex.java

含有对tinydb中select 语句的词法和语法分析

/*									tab:4
 * "Copyright (c) 2000-2003 The Regents of the University  of California.  
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */
package net.tinyos.tinydb.parser;
//import sym.*;
import java_cup.runtime.*;
/* semantic value of token returned by scanner */
class TokenValue {
  public int lineBegin;
  public int charBegin;
  public String text;
  public String filename;
  TokenValue() {
  }
  TokenValue(String text, int lineBegin, int charBegin, String filename) {
    this.text = text;
    this.lineBegin = lineBegin;
    this.charBegin = charBegin;
    this.filename = filename;
  }
  public String toString() {
    return text;
  }
  public boolean toBoolean() {
    return Boolean.valueOf(text).booleanValue();
  }
  public int toInt() {
    return Integer.valueOf(text).intValue();
  }
}


class Yylex implements java_cup.runtime.Scanner {
	private final int YY_BUFFER_SIZE = 512;
	private final int YY_F = -1;
	private final int YY_NO_STATE = -1;
	private final int YY_NOT_ACCEPT = 0;
	private final int YY_START = 1;
	private final int YY_END = 2;
	private final int YY_NO_ANCHOR = 4;
	private final int YY_BOL = 128;
	private final int YY_EOF = 129;

  public String sourceFilename;
	private java.io.BufferedReader yy_reader;
	private int yy_buffer_index;
	private int yy_buffer_read;
	private int yy_buffer_start;
	private int yy_buffer_end;
	private char yy_buffer[];
	private int yychar;
	private int yyline;
	private boolean yy_at_bol;
	private int yy_lexical_state;

	Yylex (java.io.Reader reader) {
		this ();
		if (null == reader) {
			throw (new Error("Error: Bad input stream initializer."));
		}
		yy_reader = new java.io.BufferedReader(reader);
	}

	Yylex (java.io.InputStream instream) {
		this ();
		if (null == instream) {
			throw (new Error("Error: Bad input stream initializer."));
		}
		yy_reader = new java.io.BufferedReader(new java.io.InputStreamReader(instream));
	}

	private Yylex () {
		yy_buffer = new char[YY_BUFFER_SIZE];
		yy_buffer_read = 0;
		yy_buffer_index = 0;
		yy_buffer_start = 0;
		yy_buffer_end = 0;
		yychar = 0;
		yyline = 0;
		yy_at_bol = true;
		yy_lexical_state = YYINITIAL;
	}

	private boolean yy_eof_done = false;
	private final int YYINITIAL = 0;
	private final int COMMENTS = 1;
	private final int yy_state_dtrans[] = {
		0,
		129
	};
	private void yybegin (int state) {
		yy_lexical_state = state;
	}
	private int yy_advance ()
		throws java.io.IOException {
		int next_read;
		int i;
		int j;

		if (yy_buffer_index < yy_buffer_read) {
			return yy_buffer[yy_buffer_index++];
		}

		if (0 != yy_buffer_start) {
			i = yy_buffer_start;
			j = 0;
			while (i < yy_buffer_read) {
				yy_buffer[j] = yy_buffer[i];
				++i;
				++j;
			}
			yy_buffer_end = yy_buffer_end - yy_buffer_start;
			yy_buffer_start = 0;
			yy_buffer_read = j;
			yy_buffer_index = j;
			next_read = yy_reader.read(yy_buffer,
					yy_buffer_read,
					yy_buffer.length - yy_buffer_read);
			if (-1 == next_read) {
				return YY_EOF;
			}
			yy_buffer_read = yy_buffer_read + next_read;
		}

		while (yy_buffer_index >= yy_buffer_read) {
			if (yy_buffer_index >= yy_buffer.length) {
				yy_buffer = yy_double(yy_buffer);
			}
			next_read = yy_reader.read(yy_buffer,
					yy_buffer_read,
					yy_buffer.length - yy_buffer_read);
			if (-1 == next_read) {
				return YY_EOF;
			}
			yy_buffer_read = yy_buffer_read + next_read;
		}
		return yy_buffer[yy_buffer_index++];
	}
	private void yy_move_end () {
		if (yy_buffer_end > yy_buffer_start &&
		    '\n' == yy_buffer[yy_buffer_end-1])
			yy_buffer_end--;
		if (yy_buffer_end > yy_buffer_start &&
		    '\r' == yy_buffer[yy_buffer_end-1])
			yy_buffer_end--;
	}
	private boolean yy_last_was_cr=false;
	private void yy_mark_start () {
		int i;
		for (i = yy_buffer_start; i < yy_buffer_index; ++i) {
			if ('\n' == yy_buffer[i] && !yy_last_was_cr) {
				++yyline;
			}
			if ('\r' == yy_buffer[i]) {
				++yyline;
				yy_last_was_cr=true;
			} else yy_last_was_cr=false;
		}
		yychar = yychar
			+ yy_buffer_index - yy_buffer_start;
		yy_buffer_start = yy_buffer_index;
	}
	private void yy_mark_end () {
		yy_buffer_end = yy_buffer_index;
	}
	private void yy_to_mark () {
		yy_buffer_index = yy_buffer_end;
		yy_at_bol = (yy_buffer_end > yy_buffer_start) &&
		            ('\r' == yy_buffer[yy_buffer_end-1] ||
		             '\n' == yy_buffer[yy_buffer_end-1] ||
		             2028/*LS*/ == yy_buffer[yy_buffer_end-1] ||
		             2029/*PS*/ == yy_buffer[yy_buffer_end-1]);
	}
	private java.lang.String yytext () {
		return (new java.lang.String(yy_buffer,
			yy_buffer_start,
			yy_buffer_end - yy_buffer_start));
	}
	private int yylength () {
		return yy_buffer_end - yy_buffer_start;
	}
	private char[] yy_double (char buf[]) {
		int i;
		char newbuf[];
		newbuf = new char[2*buf.length];
		for (i = 0; i < buf.length; ++i) {
			newbuf[i] = buf[i];
		}
		return newbuf;
	}
	private final int YY_E_INTERNAL = 0;
	private final int YY_E_MATCH = 1;
	private java.lang.String yy_error_string[] = {
		"Error: Internal error.\n",
		"Error: Unmatched input.\n"
	};
	private void yy_error (int code,boolean fatal) {
		java.lang.System.out.print(yy_error_string[code]);
		java.lang.System.out.flush();
		if (fatal) {
			throw new Error("Fatal Error.\n");
		}
	}
	private int[][] unpackFromString(int size1, int size2, String st) {
		int colonIndex = -1;
		String lengthString;
		int sequenceLength = 0;
		int sequenceInteger = 0;

		int commaIndex;
		String workString;

		int res[][] = new int[size1][size2];
		for (int i= 0; i < size1; i++) {
			for (int j= 0; j < size2; j++) {
				if (sequenceLength != 0) {
					res[i][j] = sequenceInteger;
					sequenceLength--;
					continue;
				}
				commaIndex = st.indexOf(',');
				workString = (commaIndex==-1) ? st :
					st.substring(0, commaIndex);
				st = st.substring(commaIndex+1);
				colonIndex = workString.indexOf(':');
				if (colonIndex == -1) {
					res[i][j]=Integer.parseInt(workString);
					continue;
				}
				lengthString =
					workString.substring(colonIndex+1);
				sequenceLength=Integer.parseInt(lengthString);
				workString=workString.substring(0,colonIndex);
				sequenceInteger=Integer.parseInt(workString);
				res[i][j] = sequenceInteger;
				sequenceLength--;
			}
		}
		return res;
	}
	private int yy_acpt[] = {
		/* 0 */ YY_NOT_ACCEPT,
		/* 1 */ YY_NO_ANCHOR,
		/* 2 */ YY_NO_ANCHOR,
		/* 3 */ YY_NO_ANCHOR,
		/* 4 */ YY_NO_ANCHOR,
		/* 5 */ YY_NO_ANCHOR,
		/* 6 */ YY_NO_ANCHOR,
		/* 7 */ YY_NO_ANCHOR,
		/* 8 */ YY_NO_ANCHOR,
		/* 9 */ YY_NO_ANCHOR,
		/* 10 */ YY_NO_ANCHOR,
		/* 11 */ YY_NO_ANCHOR,
		/* 12 */ YY_NO_ANCHOR,
		/* 13 */ YY_NO_ANCHOR,
		/* 14 */ YY_NO_ANCHOR,
		/* 15 */ YY_NO_ANCHOR,
		/* 16 */ YY_NO_ANCHOR,
		/* 17 */ YY_NO_ANCHOR,
		/* 18 */ YY_NO_ANCHOR,
		/* 19 */ YY_NO_ANCHOR,
		/* 20 */ YY_NO_ANCHOR,
		/* 21 */ YY_NO_ANCHOR,
		/* 22 */ YY_NO_ANCHOR,
		/* 23 */ YY_NO_ANCHOR,
		/* 24 */ YY_NO_ANCHOR,
		/* 25 */ YY_NO_ANCHOR,
		/* 26 */ YY_NO_ANCHOR,
		/* 27 */ YY_NO_ANCHOR,
		/* 28 */ YY_NO_ANCHOR,
		/* 29 */ YY_NO_ANCHOR,
		/* 30 */ YY_NO_ANCHOR,
		/* 31 */ YY_NO_ANCHOR,
		/* 32 */ YY_NO_ANCHOR,
		/* 33 */ YY_NO_ANCHOR,
		/* 34 */ YY_NO_ANCHOR,
		/* 35 */ YY_NO_ANCHOR,
		/* 36 */ YY_NO_ANCHOR,
		/* 37 */ YY_NO_ANCHOR,
		/* 38 */ YY_NO_ANCHOR,
		/* 39 */ YY_NO_ANCHOR,
		/* 40 */ YY_NOT_ACCEPT,
		/* 41 */ YY_NO_ANCHOR,
		/* 42 */ YY_NO_ANCHOR,
		/* 43 */ YY_NOT_ACCEPT,
		/* 44 */ YY_NO_ANCHOR,
		/* 45 */ YY_NOT_ACCEPT,
		/* 46 */ YY_NO_ANCHOR,
		/* 47 */ YY_NOT_ACCEPT,
		/* 48 */ YY_NO_ANCHOR,
		/* 49 */ YY_NOT_ACCEPT,
		/* 50 */ YY_NO_ANCHOR,
		/* 51 */ YY_NOT_ACCEPT,
		/* 52 */ YY_NO_ANCHOR,
		/* 53 */ YY_NOT_ACCEPT,
		/* 54 */ YY_NO_ANCHOR,
		/* 55 */ YY_NOT_ACCEPT,
		/* 56 */ YY_NO_ANCHOR,
		/* 57 */ YY_NOT_ACCEPT,
		/* 58 */ YY_NO_ANCHOR,
		/* 59 */ YY_NOT_ACCEPT,
		/* 60 */ YY_NO_ANCHOR,
		/* 61 */ YY_NOT_ACCEPT,
		/* 62 */ YY_NO_ANCHOR,
		/* 63 */ YY_NOT_ACCEPT,
		/* 64 */ YY_NO_ANCHOR,
		/* 65 */ YY_NOT_ACCEPT,
		/* 66 */ YY_NO_ANCHOR,
		/* 67 */ YY_NOT_ACCEPT,
		/* 68 */ YY_NO_ANCHOR,
		/* 69 */ YY_NOT_ACCEPT,
		/* 70 */ YY_NO_ANCHOR,
		/* 71 */ YY_NOT_ACCEPT,
		/* 72 */ YY_NO_ANCHOR,
		/* 73 */ YY_NOT_ACCEPT,
		/* 74 */ YY_NO_ANCHOR,
		/* 75 */ YY_NOT_ACCEPT,
		/* 76 */ YY_NO_ANCHOR,
		/* 77 */ YY_NOT_ACCEPT,
		/* 78 */ YY_NO_ANCHOR,
		/* 79 */ YY_NOT_ACCEPT,
		/* 80 */ YY_NO_ANCHOR,
		/* 81 */ YY_NOT_ACCEPT,
		/* 82 */ YY_NO_ANCHOR,
		/* 83 */ YY_NOT_ACCEPT,
		/* 84 */ YY_NO_ANCHOR,
		/* 85 */ YY_NOT_ACCEPT,
		/* 86 */ YY_NO_ANCHOR,
		/* 87 */ YY_NOT_ACCEPT,
		/* 88 */ YY_NO_ANCHOR,
		/* 89 */ YY_NOT_ACCEPT,
		/* 90 */ YY_NO_ANCHOR,
		/* 91 */ YY_NOT_ACCEPT,
		/* 92 */ YY_NO_ANCHOR,
		/* 93 */ YY_NOT_ACCEPT,
		/* 94 */ YY_NO_ANCHOR,
		/* 95 */ YY_NOT_ACCEPT,
		/* 96 */ YY_NO_ANCHOR,
		/* 97 */ YY_NOT_ACCEPT,
		/* 98 */ YY_NO_ANCHOR,
		/* 99 */ YY_NOT_ACCEPT,
		/* 100 */ YY_NO_ANCHOR,
		/* 101 */ YY_NOT_ACCEPT,
		/* 102 */ YY_NO_ANCHOR,
		/* 103 */ YY_NOT_ACCEPT,
		/* 104 */ YY_NO_ANCHOR,
		/* 105 */ YY_NOT_ACCEPT,
		/* 106 */ YY_NO_ANCHOR,
		/* 107 */ YY_NOT_ACCEPT,
		/* 108 */ YY_NO_ANCHOR,
		/* 109 */ YY_NOT_ACCEPT,
		/* 110 */ YY_NO_ANCHOR,
		/* 111 */ YY_NOT_ACCEPT,
		/* 112 */ YY_NO_ANCHOR,
		/* 113 */ YY_NOT_ACCEPT,
		/* 114 */ YY_NO_ANCHOR,
		/* 115 */ YY_NOT_ACCEPT,
		/* 116 */ YY_NO_ANCHOR,
		/* 117 */ YY_NOT_ACCEPT,
		/* 118 */ YY_NO_ANCHOR,
		/* 119 */ YY_NOT_ACCEPT,
		/* 120 */ YY_NO_ANCHOR,
		/* 121 */ YY_NOT_ACCEPT,
		/* 122 */ YY_NO_ANCHOR,
		/* 123 */ YY_NOT_ACCEPT,
		/* 124 */ YY_NOT_ACCEPT,
		/* 125 */ YY_NOT_ACCEPT,
		/* 126 */ YY_NOT_ACCEPT,
		/* 127 */ YY_NOT_ACCEPT,
		/* 128 */ YY_NOT_ACCEPT,
		/* 129 */ YY_NOT_ACCEPT,
		/* 130 */ YY_NO_ANCHOR,
		/* 131 */ YY_NOT_ACCEPT,
		/* 132 */ YY_NOT_ACCEPT,
		/* 133 */ YY_NOT_ACCEPT,
		/* 134 */ YY_NOT_ACCEPT,
		/* 135 */ YY_NO_ANCHOR,
		/* 136 */ YY_NO_ANCHOR,
		/* 137 */ YY_NO_ANCHOR,
		/* 138 */ YY_NO_ANCHOR,
		/* 139 */ YY_NO_ANCHOR,
		/* 140 */ YY_NO_ANCHOR,
		/* 141 */ YY_NO_ANCHOR,
		/* 142 */ YY_NO_ANCHOR,
		/* 143 */ YY_NO_ANCHOR,
		/* 144 */ YY_NO_ANCHOR,
		/* 145 */ YY_NO_ANCHOR,
		/* 146 */ YY_NO_ANCHOR,
		/* 147 */ YY_NO_ANCHOR,
		/* 148 */ YY_NO_ANCHOR,
		/* 149 */ YY_NO_ANCHOR,
		/* 150 */ YY_NO_ANCHOR,
		/* 151 */ YY_NO_ANCHOR,
		/* 152 */ YY_NO_ANCHOR,
		/* 153 */ YY_NO_ANCHOR,
		/* 154 */ YY_NO_ANCHOR,
		/* 155 */ YY_NO_ANCHOR,
		/* 156 */ YY_NO_ANCHOR,
		/* 157 */ YY_NO_ANCHOR,
		/* 158 */ YY_NO_ANCHOR,
		/* 159 */ YY_NO_ANCHOR,
		/* 160 */ YY_NO_ANCHOR,
		/* 161 */ YY_NO_ANCHOR,
		/* 162 */ YY_NO_ANCHOR,
		/* 163 */ YY_NO_ANCHOR,
		/* 164 */ YY_NO_ANCHOR,
		/* 165 */ YY_NO_ANCHOR,
		/* 166 */ YY_NO_ANCHOR,
		/* 167 */ YY_NO_ANCHOR,
		/* 168 */ YY_NO_ANCHOR,
		/* 169 */ YY_NO_ANCHOR,
		/* 170 */ YY_NO_ANCHOR,
		/* 171 */ YY_NO_ANCHOR,
		/* 172 */ YY_NO_ANCHOR,
		/* 173 */ YY_NO_ANCHOR,
		/* 174 */ YY_NO_ANCHOR,
		/* 175 */ YY_NO_ANCHOR,
		/* 176 */ YY_NO_ANCHOR,
		/* 177 */ YY_NO_ANCHOR,
		/* 178 */ YY_NO_ANCHOR,
		/* 179 */ YY_NO_ANCHOR,
		/* 180 */ YY_NO_ANCHOR,
		/* 181 */ YY_NO_ANCHOR,
		/* 182 */ YY_NO_ANCHOR,
		/* 183 */ YY_NO_ANCHOR,
		/* 184 */ YY_NO_ANCHOR,
		/* 185 */ YY_NO_ANCHOR,
		/* 186 */ YY_NO_ANCHOR,
		/* 187 */ YY_NO_ANCHOR,
		/* 188 */ YY_NO_ANCHOR,
		/* 189 */ YY_NO_ANCHOR,
		/* 190 */ YY_NO_ANCHOR,
		/* 191 */ YY_NO_ANCHOR,
		/* 192 */ YY_NO_ANCHOR,
		/* 193 */ YY_NO_ANCHOR,
		/* 194 */ YY_NO_ANCHOR,
		/* 195 */ YY_NO_ANCHOR,
		/* 196 */ YY_NO_ANCHOR,
		/* 197 */ YY_NO_ANCHOR,
		/* 198 */ YY_NO_ANCHOR,
		/* 199 */ YY_NO_ANCHOR,
		/* 200 */ YY_NO_ANCHOR,
		/* 201 */ YY_NO_ANCHOR,
		/* 202 */ YY_NO_ANCHOR,
		/* 203 */ YY_NO_ANCHOR,
		/* 204 */ YY_NO_ANCHOR,
		/* 205 */ YY_NO_ANCHOR,