[jflex-users] problem handling the character hex FF

[Ulf D. <udi...@ya...>]

Hello-

I'm trying to handle a file that contains the character hex FF, but that results in an exception: 
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 711
        at JFlex_problem.yylex(JFlex_problem.java:503)
        at JFlex_problem.main(JFlex_problem.java:237)

711 is the value of the zzInput variable, which is used as an index into an array of length 256.

I thought declaring the parser as "8bit" should be sufficient to handle just about everything; am I missing something? I'm appending a minimal jflex file that exhibits the problem below. I'd be grateful on any clues on how to handle that character.

Thanks in advance,
Ulf



import java.io.*;

%%

%public
%class JFlex_problem
%8bit
%int
%apiprivate

%{
	public JFlex_problem() { }

	public static void main (String args[]) throws Exception {
		if (args == null) {
			System.err.println("usage: java JFlex_problem file");
			System.exit(1);
		}
		JFlex_problem self = new JFlex_problem();
		self.zzReader = new FileReader(args[0]);
		while ( !self.zzAtEOF ) self.yylex();
	}

%}

%%

<YYINITIAL> {
	. {
		System.out.println("read char: "+(int)yytext().charAt(0));
	}
}

.|\n {
	/* ignore every character that's not recognizably part of a command */
	System.out.println("ignoring char: "+(int)yytext().charAt(0));
}