1   /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
2   package jminusminus;
3   
4   public class TokenMgrError extends Error
5   {
6      /*
7       * Ordinals for various reasons why an Error of this type can be thrown.
8       */
9   
10     /**
11      * Lexical error occured.
12      */
13     static final int LEXICAL_ERROR = 0;
14  
15     /**
16      * An attempt wass made to create a second instance of a static token manager.
17      */
18     static final int STATIC_LEXER_ERROR = 1;
19  
20     /**
21      * Tried to change to an invalid lexical state.
22      */
23     static final int INVALID_LEXICAL_STATE = 2;
24  
25     /**
26      * Detected (and bailed out of) an infinite loop in the token manager.
27      */
28     static final int LOOP_DETECTED = 3;
29  
30     /**
31      * Indicates the reason why the exception is thrown. It will have
32      * one of the above 4 values.
33      */
34     int errorCode;
35  
36     /**
37      * Replaces unprintable characters by their espaced (or unicode escaped)
38      * equivalents in the given string
39      */
40     protected static final String addEscapes(String str) {
41        StringBuffer retval = new StringBuffer();
42        char ch;
43        for (int i = 0; i < str.length(); i++) {
44          switch (str.charAt(i))
45          {
46             case 0 :
47                continue;
48             case '\b':
49                retval.append("\\b");
50                continue;
51             case '\t':
52                retval.append("\\t");
53                continue;
54             case '\n':
55                retval.append("\\n");
56                continue;
57             case '\f':
58                retval.append("\\f");
59                continue;
60             case '\r':
61                retval.append("\\r");
62                continue;
63             case '\"':
64                retval.append("\\\"");
65                continue;
66             case '\'':
67                retval.append("\\\'");
68                continue;
69             case '\\':
70                retval.append("\\\\");
71                continue;
72             default:
73                if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
74                   String s = "0000" + Integer.toString(ch, 16);
75                   retval.append("\\u" + s.substring(s.length() - 4, s.length()));
76                } else {
77                   retval.append(ch);
78                }
79                continue;
80          }
81        }
82        return retval.toString();
83     }
84  
85     /**
86      * Returns a detailed message for the Error when it is thrown by the
87      * token manager to indicate a lexical error.
88      * Parameters : 
89      *    EOFSeen     : indicates if EOF caused the lexicl error
90      *    curLexState : lexical state in which this error occured
91      *    errorLine   : line number when the error occured
92      *    errorColumn : column number when the error occured
93      *    errorAfter  : prefix that was seen before this error occured
94      *    curchar     : the offending character
95      * Note: You can customize the lexical error message by modifying this method.
96      */
97     protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
98        return("Lexical error at line " +
99             errorLine + ", column " +
100            errorColumn + ".  Encountered: " +
101            (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
102            "after : \"" + addEscapes(errorAfter) + "\"");
103    }
104 
105    /**
106     * You can also modify the body of this method to customize your error messages.
107     * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
108     * of end-users concern, so you can return something like : 
109     *
110     *     "Internal Error : Please file a bug report .... "
111     *
112     * from this method for such cases in the release version of your parser.
113     */
114    public String getMessage() {
115       return super.getMessage();
116    }
117 
118    /*
119     * Constructors of various flavors follow.
120     */
121 
122    public TokenMgrError() {
123    }
124 
125    public TokenMgrError(String message, int reason) {
126       super(message);
127       errorCode = reason;
128    }
129 
130    public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
131       this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
132    }
133 }
134