analysis/tcl/TclSymbolTokenizer.lex

	TclSymbolTokenizer.lex revision eb32a77fdb57f20c042b7b79b28a4fb4060cb949
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * See LICENSE.txt included in this distribution for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at LICENSE.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Gets Tcl symbols - ignores comments, strings, keywords
 */

package org.opensolaris.opengrok.analysis.tcl;
import java.io.*;
import org.opensolaris.opengrok.analysis.JFlexTokenizer;
import org.apache.lucene.analysis.Token;
%%
%public
%class TclSymbolTokenizer
%extends JFlexTokenizer
%unicode
%type Token

%{
  private Token reuseToken=new Token();

  public void close() {
  }

  public void reInit(char[] buf, int len) {
        yyreset((Reader) null);
        zzBuffer = buf;
        zzEndRead = len;
        zzAtEOF = true;
        zzStartRead = 0;
  }

%}
Identifier = [\:\=a-zA-Z0-9_]+

%state STRING COMMENT SCOMMENT

%%

<YYINITIAL> {
{Identifier} {String id = yytext();
              if (!Consts.kwd.contains(id)) {
                    reuseToken.reinit(zzBuffer, zzStartRead, zzMarkedPos-zzStartRead, zzStartRead, zzMarkedPos);
                    return reuseToken; }
              }
 \"     { yybegin(STRING); }
"#"     { yybegin(SCOMMENT); }
}

<STRING> {
 \"     { yybegin(YYINITIAL); }
\\\\ | \\\"     {}
}

<SCOMMENT> {
\n      { yybegin(YYINITIAL);}
}

<YYINITIAL, STRING, COMMENT, SCOMMENT> {
<<EOF>>   { return null;}
.|\n    {}
}