📄 mjlexer.java
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/* The following code was generated by JFlex 1.4.1 on 06-5-15 下午6:36 */
package edu.ustc.cs.minijool.lexer;
/**
* This class is a scanner generated by
* <a href="http://www.jflex.de/">JFlex</a> 1.4.1
* on 06-5-15 下午6:36 from the specification file
* <tt>D:/Compiler/design/workspace/Lab2/JFlex/MiniJOOL.lex</tt>
*/
public class MJLexer {
/** 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, 2, 2, 0, 2, 2, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
3, 41, 1, 7, 7, 39, 42, 10, 29, 30, 38, 36, 34, 37, 35, 4,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 33, 45, 40, 44, 7,
7, 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, 7, 8, 7, 7, 7,
7, 13, 17, 15, 22, 20, 26, 5, 25, 14, 5, 5, 19, 5, 16, 18,
28, 5, 9, 11, 12, 27, 21, 24, 23, 5, 5, 31, 43, 32, 7, 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\2\1\1\2\1\3\1\4\1\5\14\4\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\2\1\1\23\1\24\1\25"+
"\2\0\1\2\1\26\5\4\1\27\12\4\1\30\1\31"+
"\1\32\1\33\1\34\1\35\1\36\1\37\1\40\1\41"+
"\1\42\1\43\4\4\1\44\1\4\1\45\10\4\1\46"+
"\1\47\2\4\1\50\1\51\1\4\1\52\1\4\1\53"+
"\1\4\1\54\4\4\1\55\2\4\1\56\1\57\1\60"+
"\1\61\2\4\1\62\1\63";
private static int [] zzUnpackAction() {
int [] result = new int[111];
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\56\0\134\0\56\0\212\0\270\0\346\0\u0114"+
"\0\u0142\0\u0170\0\u019e\0\u01cc\0\u01fa\0\u0228\0\u0256\0\u0284"+
"\0\u02b2\0\u02e0\0\u030e\0\56\0\56\0\56\0\56\0\56"+
"\0\56\0\56\0\u033c\0\u036a\0\u0398\0\u03c6\0\u03f4\0\u0422"+
"\0\u0450\0\u047e\0\u04ac\0\u04da\0\56\0\134\0\u0508\0\u0536"+
"\0\56\0\u0564\0\u0592\0\u05c0\0\u05ee\0\u061c\0\270\0\u064a"+
"\0\u0678\0\u06a6\0\u06d4\0\u0702\0\u0730\0\u075e\0\u078c\0\u07ba"+
"\0\u07e8\0\56\0\56\0\56\0\56\0\56\0\56\0\56"+
"\0\56\0\56\0\u0816\0\56\0\u0844\0\u0872\0\u08a0\0\u08ce"+
"\0\u08fc\0\270\0\u092a\0\270\0\u0958\0\u0986\0\u09b4\0\u09e2"+
"\0\u0a10\0\u0a3e\0\u0a6c\0\u0a9a\0\56\0\56\0\u0ac8\0\u0af6"+
"\0\270\0\270\0\u0b24\0\270\0\u0b52\0\270\0\u0b80\0\270"+
"\0\u0bae\0\u0bdc\0\u0c0a\0\u0c38\0\270\0\u0c66\0\u0c94\0\270"+
"\0\270\0\270\0\270\0\u0cc2\0\u0cf0\0\270\0\270";
private static int [] zzUnpackRowMap() {
int [] result = new int[111];
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 =
"\1\2\1\3\2\4\1\5\1\6\1\7\2\2\1\10"+
"\1\2\1\11\1\12\1\6\1\13\1\14\1\15\1\16"+
"\2\6\1\17\1\20\2\6\1\21\1\6\1\22\1\6"+
"\1\23\1\24\1\25\1\26\1\27\1\30\1\31\1\32"+
"\1\33\1\34\1\35\1\36\1\37\1\40\1\41\1\42"+
"\1\43\1\44\57\0\1\45\1\0\5\46\1\47\45\46"+
"\4\0\1\50\43\0\1\51\12\0\2\6\2\0\1\6"+
"\1\0\22\6\27\0\1\7\54\0\2\6\2\0\1\6"+
"\1\0\11\6\1\52\10\6\26\0\2\6\2\0\1\6"+
"\1\0\1\6\1\53\20\6\26\0\2\6\2\0\1\54"+
"\1\0\16\6\1\55\3\6\26\0\2\6\2\0\1\6"+
"\1\0\5\6\1\56\11\6\1\57\2\6\26\0\2\6"+
"\2\0\1\6\1\0\10\6\1\60\11\6\26\0\2\6"+
"\2\0\1\6\1\0\11\6\1\61\6\6\1\62\1\6"+
"\26\0\2\6\2\0\1\6\1\0\7\6\1\63\12\6"+
"\26\0\2\6\2\0\1\6\1\0\10\6\1\64\3\6"+
"\1\65\5\6\26\0\2\6\2\0\1\6\1\0\7\6"+
"\1\66\12\6\26\0\2\6\2\0\1\6\1\0\16\6"+
"\1\67\3\6\26\0\2\6\2\0\1\6\1\0\2\6"+
"\1\70\17\6\26\0\2\6\2\0\1\71\1\0\22\6"+
"\71\0\1\72\55\0\1\73\55\0\1\74\55\0\1\75"+
"\55\0\1\76\55\0\1\77\57\0\1\100\56\0\1\101"+
"\52\0\1\102\3\0\1\103\51\0\1\104\4\0\1\105"+
"\1\0\1\46\6\0\3\46\1\0\1\46\3\0\1\46"+
"\11\0\1\46\24\0\1\50\1\0\53\50\5\0\2\6"+
"\2\0\1\6\1\0\1\6\1\106\20\6\26\0\2\6"+
"\2\0\1\6\1\0\2\6\1\107\17\6\26\0\2\6"+
"\2\0\1\6\1\0\20\6\1\110\1\6\26\0\2\6"+
"\2\0\1\6\1\0\3\6\1\111\16\6\26\0\2\6"+
"\2\0\1\6\1\0\1\6\1\112\20\6\26\0\2\6"+
"\2\0\1\6\1\0\2\6\1\113\17\6\26\0\2\6"+
"\2\0\1\6\1\0\15\6\1\114\4\6\26\0\2\6"+
"\2\0\1\6\1\0\10\6\1\115\11\6\26\0\2\6"+
"\2\0\1\6\1\0\7\6\1\116\12\6\26\0\2\6"+
"\2\0\1\6\1\0\1\117\21\6\26\0\2\6\2\0"+
"\1\6\1\0\1\6\1\120\20\6\26\0\2\6\2\0"+
"\1\6\1\0\3\6\1\121\16\6\26\0\2\6\2\0"+
"\1\6\1\0\3\6\1\122\16\6\26\0\2\6\2\0"+
"\1\6\1\0\10\6\1\123\11\6\26\0\2\6\2\0"+
"\1\6\1\0\3\6\1\124\16\6\71\0\1\125\55\0"+
"\1\126\12\0\2\6\2\0\1\6\1\0\20\6\1\127"+
"\1\6\26\0\2\6\2\0\1\6\1\0\1\6\1\130"+
"\20\6\26\0\2\6\2\0\1\6\1\0\11\6\1\131"+
"\10\6\26\0\2\6\2\0\1\6\1\0\1\132\21\6"+
"\26\0\2\6\2\0\1\6\1\0\1\133\21\6\26\0"+
"\2\6\2\0\1\6\1\0\10\6\1\134\11\6\26\0"+
"\2\6\2\0\1\6\1\0\10\6\1\135\11\6\26\0"+
"\2\6\2\0\1\6\1\0\11\6\1\136\10\6\26\0"+
"\2\6\2\0\1\6\1\0\11\6\1\137\10\6\26\0"+
"\2\6\2\0\1\6\1\0\13\6\1\140\6\6\26\0"+
"\2\6\2\0\1\6\1\0\10\6\1\141\11\6\26\0"+
"\2\6\2\0\1\6\1\0\1\110\21\6\26\0\2\6"+
"\2\0\1\6\1\0\5\6\1\142\14\6\26\0\2\6"+
"\2\0\1\143\1\0\22\6\26\0\2\6\2\0\1\6"+
"\1\0\3\6\1\144\16\6\26\0\2\6\2\0\1\6"+
"\1\0\1\145\21\6\26\0\2\6\2\0\1\6\1\0"+
"\11\6\1\146\10\6\26\0\2\6\2\0\1\6\1\0"+
"\5\6\1\147\14\6\26\0\2\6\2\0\1\6\1\0"+
"\11\6\1\150\10\6\26\0\2\6\2\0\1\6\1\0"+
"\1\6\1\151\20\6\26\0\2\6\2\0\1\6\1\0"+
"\5\6\1\152\14\6\26\0\2\6\2\0\1\6\1\0"+
"\4\6\1\153\15\6\26\0\2\6\2\0\1\6\1\0"+
"\2\6\1\154\17\6\26\0\2\6\2\0\1\6\1\0"+
"\13\6\1\155\6\6\26\0\2\6\2\0\1\6\1\0"+
"\5\6\1\156\14\6\26\0\2\6\2\0\1\6\1\0"+
"\1\157\21\6\21\0";
private static int [] zzUnpackTrans() {
int [] result = new int[3358];
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\1\11\1\1\1\11\17\1\7\11\12\1\1\11"+
"\2\0\1\1\1\11\20\1\11\11\1\1\1\11\20\1"+
"\2\11\31\1";
private static int [] zzUnpackAttribute() {
int [] result = new int[111];
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: */
public static void main(String argv[]) {
if (argv.length != 1) {
System.out.println("Usage: java MJLexer inputfile");
}
else {
MJLexer l =null;
try {
l = new MJLexer(new java.io.FileReader(argv[0]));
Symbol s = l.yylex();
while (s.getType() != Symbol.EOF) {
System.out.println(s);
s = l.yylex();
}
} catch (Exception e) {
System.out.println("Unexpected exception:");
e.printStackTrace();
}
}
}
private Symbol symbol(int type) {
return new Symbol(type, yytext(), yyline, yycolumn);
}
/**
* 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 MJLexer(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 MJLexer(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
*
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