?? sqlscanner.java
字號:
//Author: Jianguo Lu jglu@cs.toronto.edu
//Feb 2001.
package sql4j.parser;
import java.util.*;
import java.lang.*;
import java_cup.runtime.*;
import java.io.*;
import org.apache.log4j.Category;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.BasicConfigurator;
class SQLScanner {
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 = 256;
private final int YY_EOF = 257;
static Category cat = Category.getInstance(SQLScanner.class.getName());
static SQLScanner foo;
public static void init(InputStream is) {
BasicConfigurator.configure();
cat.setPriority(org.apache.log4j.Priority.ERROR);
foo = new SQLScanner(is);
}
public static Symbol next_token() throws java.io.IOException {
Symbol s= foo.yylex();
String prompt="";
if (s.value !=null && s.value instanceof String){
prompt=prompt+" "+ s.value;
}
cat.debug(prompt);
return s;
}
public class IntStack {
Stack stack;
public IntStack(){stack=new Stack(); }
public IntStack(int i)
{ stack=new Stack(); stack.push(new Integer(i));}
public void push(int i){
stack.push(new Integer(i));
cat.debug("States:"+stack.toString());
}
public int peek(){
Object o= stack.peek();
if (o instanceof Integer){
return ((Integer)o).intValue();
}else {
cat.error("Int expected.");
return -1;
}
}
public int popPeek(){
cat.debug("state stack "+stack.toString());
cat.debug("current state: "+this.peek()+" ==> ");
int result= -1;
stack.pop();
Object o=stack.peek();
if (o instanceof Integer){
result=((Integer)o).intValue();
cat.debug("next state:"+result);
} else
cat.error("Int expected;");
return result;
}
public int pop(){
Object o=stack.pop();
if (o instanceof Integer){
return ((Integer)o).intValue();
} else
cat.error("Int expected;");
return -1;
}
}
IntStack states=new IntStack();
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;
SQLScanner (java.io.Reader reader) {
this ();
if (null == reader) {
throw (new Error("Error: Bad input stream initializer."));
}
yy_reader = new java.io.BufferedReader(reader);
}
SQLScanner (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 SQLScanner () {
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;
states.push(YYINITIAL);
}
private boolean yy_eof_done = false;
private final int COMMENT_BLK = 1;
private final int YYINITIAL = 0;
private final int yy_state_dtrans[] = {
0,
96
};
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_NO_ANCHOR,
/* 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_NOT_ACCEPT,
/* 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_NO_ANCHOR,
/* 41 */ YY_NO_ANCHOR,
/* 42 */ YY_NO_ANCHOR,
/* 43 */ YY_NO_ANCHOR,
/* 44 */ YY_NO_ANCHOR,
/* 45 */ YY_NO_ANCHOR,
/* 46 */ YY_NO_ANCHOR,
/* 47 */ YY_NO_ANCHOR,
/* 48 */ YY_NO_ANCHOR,
/* 49 */ YY_NO_ANCHOR,
/* 50 */ YY_NO_ANCHOR,
/* 51 */ YY_NO_ANCHOR,
/* 52 */ YY_NO_ANCHOR,
/* 53 */ YY_NO_ANCHOR,
/* 54 */ YY_NO_ANCHOR,
/* 55 */ YY_NO_ANCHOR,
/* 56 */ YY_NO_ANCHOR,
/* 57 */ YY_NO_ANCHOR,
/* 58 */ YY_NO_ANCHOR,
/* 59 */ YY_NO_ANCHOR,
/* 60 */ YY_NO_ANCHOR,
/* 61 */ YY_NO_ANCHOR,
/* 62 */ YY_NO_ANCHOR,
/* 63 */ YY_NO_ANCHOR,
/* 64 */ YY_NO_ANCHOR,
/* 65 */ YY_NO_ANCHOR,
/* 66 */ YY_NO_ANCHOR,
/* 67 */ YY_NO_ANCHOR,
/* 68 */ YY_NO_ANCHOR,
/* 69 */ YY_NO_ANCHOR,
/* 70 */ YY_NO_ANCHOR,
/* 71 */ YY_NO_ANCHOR,
/* 72 */ YY_NO_ANCHOR,
/* 73 */ YY_NO_ANCHOR,
/* 74 */ YY_NO_ANCHOR,
/* 75 */ YY_NO_ANCHOR,
/* 76 */ YY_NO_ANCHOR,
/* 77 */ YY_NOT_ACCEPT,
/* 78 */ YY_NO_ANCHOR,
/* 79 */ YY_NO_ANCHOR,
/* 80 */ YY_NO_ANCHOR,
/* 81 */ YY_NO_ANCHOR,
/* 82 */ YY_NO_ANCHOR,
/* 83 */ YY_NO_ANCHOR,
/* 84 */ YY_NO_ANCHOR,
/* 85 */ YY_NOT_ACCEPT,
/* 86 */ YY_NO_ANCHOR,
/* 87 */ YY_NO_ANCHOR,
/* 88 */ YY_NOT_ACCEPT,
/* 89 */ YY_NO_ANCHOR,
/* 90 */ YY_NOT_ACCEPT,
/* 91 */ YY_NO_ANCHOR,
/* 92 */ YY_NOT_ACCEPT,
/* 93 */ YY_NO_ANCHOR,
/* 94 */ YY_NOT_ACCEPT,
/* 95 */ YY_NO_ANCHOR,
/* 96 */ YY_NOT_ACCEPT,
/* 97 */ YY_NO_ANCHOR,
/* 98 */ YY_NO_ANCHOR,
/* 99 */ YY_NO_ANCHOR,
/* 100 */ YY_NO_ANCHOR,
/* 101 */ YY_NO_ANCHOR,
/* 102 */ YY_NO_ANCHOR,
/* 103 */ YY_NO_ANCHOR,
/* 104 */ YY_NO_ANCHOR,
/* 105 */ YY_NO_ANCHOR,
/* 106 */ YY_NO_ANCHOR,
/* 107 */ YY_NO_ANCHOR,
/* 108 */ YY_NO_ANCHOR,
/* 109 */ YY_NO_ANCHOR,
/* 110 */ YY_NO_ANCHOR,
/* 111 */ YY_NO_ANCHOR,
/* 112 */ YY_NO_ANCHOR,
/* 113 */ YY_NO_ANCHOR,
/* 114 */ YY_NO_ANCHOR,
/* 115 */ YY_NO_ANCHOR,
/* 116 */ YY_NO_ANCHOR,
/* 117 */ YY_NO_ANCHOR,
/* 118 */ YY_NO_ANCHOR,
/* 119 */ YY_NO_ANCHOR,
/* 120 */ YY_NO_ANCHOR,
/* 121 */ YY_NO_ANCHOR,
/* 122 */ YY_NO_ANCHOR,
/* 123 */ YY_NO_ANCHOR,
/* 124 */ YY_NO_ANCHOR,
/* 125 */ YY_NO_ANCHOR,
/* 126 */ YY_NO_ANCHOR,
/* 127 */ YY_NO_ANCHOR,
/* 128 */ YY_NO_ANCHOR,
/* 129 */ YY_NO_ANCHOR,
/* 130 */ YY_NO_ANCHOR,
/* 131 */ YY_NO_ANCHOR,
/* 132 */ YY_NO_ANCHOR,
/* 133 */ YY_NO_ANCHOR,
/* 134 */ YY_NO_ANCHOR,
/* 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,
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