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    1   /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 0.7pre2 */
    2   package net.bonzoun.cocodonkey;
    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      private static final 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   }

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