📄 tiger.lex.java
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package Parse;import ErrorMsg.ErrorMsg;
class Yylex implements Lexer {
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;
private ErrorMsg errorMsg;private void newline() { errorMsg.newline(yychar);}private void err(int pos, String s) { errorMsg.error(pos,s);}private void err(String s) { err(yychar,s);}private com.sun.java_cup.internal.runtime.Symbol tok(int kind, Object value) { return new com.sun.java_cup.internal.runtime.Symbol(kind, yychar, yychar+yylength(), value);}Yylex(java.io.InputStream s, ErrorMsg e) { this(s); errorMsg=e;}private int comment_count = 0; //used to detect unclosed commentprivate StringBuffer temp = null; //bufferprivate int str_beg = -1; //used to dectect unclosed string 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 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;
yy_at_bol = true;
yy_lexical_state = YYINITIAL;
}
private boolean yy_eof_done = false;
private final int STRING = 3;
private final int YYINITIAL = 0;
private final int COMMENT = 1;
private final int STARINCOM = 2;
private final int yy_state_dtrans[] = {
0,
50,
52,
55
};
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 () {
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_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_NOT_ACCEPT,
/* 62 */ YY_NO_ANCHOR,
/* 63 */ YY_NO_ANCHOR,
/* 64 */ YY_NO_ANCHOR,
/* 65 */ YY_NO_ANCHOR,
/* 66 */ YY_NO_ANCHOR,
/* 67 */ YY_NOT_ACCEPT,
/* 68 */ YY_NO_ANCHOR,
/* 69 */ YY_NO_ANCHOR,
/* 70 */ YY_NOT_ACCEPT,
/* 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_NO_ANCHOR,
/* 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_NO_ANCHOR,
/* 86 */ YY_NO_ANCHOR,
/* 87 */ YY_NO_ANCHOR,
/* 88 */ YY_NO_ANCHOR,
/* 89 */ YY_NO_ANCHOR,
/* 90 */ YY_NO_ANCHOR,
/* 91 */ YY_NO_ANCHOR,
/* 92 */ YY_NO_ANCHOR,
/* 93 */ YY_NO_ANCHOR,
/* 94 */ YY_NO_ANCHOR,
/* 95 */ YY_NO_ANCHOR,
/* 96 */ YY_NO_ANCHOR,
/* 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
};
private int yy_cmap[] = unpackFromString(1,130,
"42:9,46,41,42:2,40,42:18,46,42,43,42:3,18,42,4,5,13,11,1,12,10,14,45:10,2,3" +
",16,15,17,42:2,47:26,6,44,7,42,48,42,27,36,23,35,31,20,47,30,25,47,37,32,47" +
",22,26,39,47,28,33,24,21,38,34,47,29,47,8,19,9,42:2,0:2")[0];
private int yy_rmap[] = unpackFromString(1,108,
"0,1:2,2,1:11,3,1,4,5,1:2,6,7,1:3,8,1:5,9:5,10,9:12,11,1,12,1:2,13,1:5,14,15" +
",16,17,18,19,20,21,20,22,23,24,25,9,26,27,28,29,30,31,32,33,34,35,36,37,38," +
"39,40,41,42,43,44,45,46,47,9,48,49,50,51,52,53,54,55,56,57")[0];
private int yy_nxt[][] = unpackFromString(58,49,
"1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,97,100,97,62,68,71,10" +
"1,97:3,102,103,97,104,72,105,97,106,97,22,23,24,25,24,26,22,97,24,-1:64,27," +
"-1:46,28,-1:50,29,-1,30,-1:46,31,-1:53,97,107,97:4,73,97:13,-1:5,74,-1,97,7" +
"4,-1:40,22,-1:5,22,-1:22,37:20,-1:5,26,-1,37,-1:21,97:20,-1:5,74,-1,97,74,-" +
"1:20,37:20,-1:5,37,-1,37:2,1,63:12,51,63:27,23,63:7,1,64:12,53,54,64:26,-1," +
"64:7,1,65:40,56,65,57,61,65:4,-1,58:39,67:2,58:3,66,69,58:2,-1:20,97:6,32,9" +
"7:2,76,77,97:9,-1:5,74,-1,97,74,-1,63:12,-1,63:27,-1,63:7,-1,64:12,-1:2,64:" +
"26,-1,64:7,-1,65:40,-1,65,-1:2,65:4,-1:45,70,-1:43,67:2,-1:2,59,-1,67,-1:22" +
",33,97,34,97:17,-1:5,74,-1,97,74,-1:45,60,-1:23,35,97:19,-1:5,74,-1,97,74,-" +
"1:20,97:6,36,97:13,-1:5,74,-1,97,74,-1:20,97:8,38,97:11,-1:5,74,-1,97,74,-1" +
":20,97:12,39,97:7,-1:5,74,-1,97,74,-1:20,97:19,85,-1:5,74,-1,97,74,-1:20,97" +
":11,86,97:8,-1:5,74,-1,97,74,-1:20,97:8,87,97:11,-1:5,74,-1,97,74,-1:20,97:" +
"15,40,97:4,-1:5,74,-1,97,74,-1:20,97:13,88,97:6,-1:5,74,-1,97,74,-1:20,97:4" +
",41,97:15,-1:5,74,-1,97,74,-1:20,97:5,89,97:14,-1:5,74,-1,97,74,-1:20,97:8," +
"42,97:11,-1:5,74,-1,97,74,-1:20,97:3,90,97:16,-1:5,74,-1,97,74,-1:20,97:11," +
"43,97:8,-1:5,74,-1,97,74,-1:20,97:2,44,97:17,-1:5,74,-1,97,74,-1:20,97:7,91" +
",97:12,-1:5,74,-1,97,74,-1:20,97:11,45,97:8,-1:5,74,-1,97,74,-1:20,97:12,92" +
",97:7,-1:5,74,-1,97,74,-1:20,97:4,94,97:15,-1:5,74,-1,97,74,-1:20,97:9,46,9" +
"7:10,-1:5,74,-1,97,74,-1:20,97:11,47,97:8,-1:5,74,-1,97,74,-1:20,97:17,48,9" +
"7:2,-1:5,74,-1,97,74,-1:20,97:5,95,97:14,-1:5,74,-1,97,74,-1:20,97:6,96,97:" +
"13,-1:5,74,-1,97,74,-1:20,97:2,49,97:17,-1:5,74,-1,97,74,-1:20,97:11,99,97:" +
"8,-1:5,74,-1,97,74,-1:20,97:7,93,97:12,-1:5,74,-1,97,74,-1:20,97:5,75,97:14" +
",-1:5,74,-1,97,74,-1:20,97:8,78,97:11,-1:5,74,-1,97,74,-1:20,97:2,79,97:9,8" +
"0,97:7,-1:5,74,-1,97,74,-1:20,97:11,81,97:8,-1:5,74,-1,97,74,-1:20,97:10,82" +
",97:9,-1:5,74,-1,97,74,-1:20,97:8,98,97:11,-1:5,74,-1,97,74,-1:20,97:7,83,9" +
"7:12,-1:5,74,-1,97,74,-1:20,97:2,84,97:17,-1:5,74,-1,97,74");
public com.sun.java_cup.internal.runtime.Symbol nextToken ()
throws java.io.IOException {
int yy_lookahead;
int yy_anchor = YY_NO_ANCHOR;
int yy_state = yy_state_dtrans[yy_lexical_state];
int yy_next_state = YY_NO_STATE;
int yy_last_accept_state = YY_NO_STATE;
boolean yy_initial = true;
int yy_this_accept;
yy_mark_start();
yy_this_accept = yy_acpt[yy_state];
if (YY_NOT_ACCEPT != yy_this_accept) {
yy_last_accept_state = yy_state;
yy_mark_end();
}
while (true) {
if (yy_initial && yy_at_bol) yy_lookahead = YY_BOL;
else yy_lookahead = yy_advance();
yy_next_state = YY_F;
yy_next_state = yy_nxt[yy_rmap[yy_state]][yy_cmap[yy_lookahead]];
if (YY_EOF == yy_lookahead && true == yy_initial) {
if(comment_count != 0) { err("注释语句不匹配,缺少*/."); } if(str_beg != -1) { yybegin(YYINITIAL); err("字符串语句不匹配,缺少\""); str_beg = -1; return tok(sym.STRING,temp.toString()); } return tok(sym.EOF, null); }
if (YY_F != yy_next_state) {
yy_state = yy_next_state;
yy_initial = false;
yy_this_accept = yy_acpt[yy_state];
if (YY_NOT_ACCEPT != yy_this_accept) {
yy_last_accept_state = yy_state;
yy_mark_end();
}
}
else {
if (YY_NO_STATE == yy_last_accept_state) {
throw (new Error("Lexical Error: Unmatched Input."));
}
else {
yy_anchor = yy_acpt[yy_last_accept_state];
if (0 != (YY_END & yy_anchor)) {
yy_move_end();
}
yy_to_mark();
switch (yy_last_accept_state) {
case 1:
case -2:
break;
case 2:
{return tok(sym.COMMA, null);}
case -3:
break;
case 3:
{return tok(sym.COLON, null);}
case -4:
break;
case 4:
{return tok(sym.SEMICOLON, null);}
case -5:
break;
case 5:
{return tok(sym.LPAREN, null);}
case -6:
break;
case 6:
{return tok(sym.RPAREN, null);}
case -7:
break;
case 7:
{return tok(sym.LBRACK, null);}
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