001/*
002 *  gnu/regexp/RETokenEnd.java
003 *  Copyright (C) 1998-2001 Wes Biggs
004 *
005 *  This library is free software; you can redistribute it and/or modify
006 *  it under the terms of the GNU Lesser General Public License as published
007 *  by the Free Software Foundation; either version 2.1 of the License, or
008 *  (at your option) any later version.
009 *
010 *  This library is distributed in the hope that it will be useful,
011 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
012 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 *  GNU Lesser General Public License for more details.
014 *
015 *  You should have received a copy of the GNU Lesser General Public License
016 *  along with this program; if not, write to the Free Software
017 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
018 */
019package gnu.regexp;
020
021final class RETokenEnd extends REToken {
022    /**
023     * Indicates whether this token should match on a line break.
024     */
025  private String newline;
026
027  RETokenEnd(int subIndex,String newline) { 
028    super(subIndex);
029    this.newline = newline;
030  }
031
032    boolean match(CharIndexed input, REMatch mymatch) {
033        char ch = input.charAt(mymatch.index);
034        if (ch == CharIndexed.OUT_OF_BOUNDS)
035            return ((mymatch.eflags & RE.REG_NOTEOL)>0) ? 
036                false : next(input, mymatch);
037        if (newline != null) {
038            char z;
039            int i = 0; // position in newline
040            do {
041                z = newline.charAt(i);
042                if (ch != z) return false;
043                ++i;
044                ch = input.charAt(mymatch.index + i);
045            } while (i < newline.length());
046            
047            return next(input, mymatch);
048        }
049        return false;
050    }
051
052  void dump(StringBuffer os) {
053    os.append('$');
054  }
055}