001/*
002 *  gnu/regexp/RETokenAny.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 */
019
020package gnu.regexp;
021
022final class RETokenAny extends REToken {
023  /** True if '.' can match a newline (RE_DOT_NEWLINE) */
024  private boolean newline; 
025
026  /** True if '.' can't match a null (RE_DOT_NOT_NULL) */
027  private boolean matchNull;    
028  
029  RETokenAny(int subIndex, boolean newline, boolean matchNull) { 
030    super(subIndex);
031    this.newline = newline;
032    this.matchNull = matchNull;
033  }
034
035  int getMinimumLength() {
036    return 1;
037  }
038
039    boolean match(CharIndexed input, REMatch mymatch) {
040    char ch = input.charAt(mymatch.index);
041    if ((ch == CharIndexed.OUT_OF_BOUNDS)
042        || (!newline && (ch == '\n'))
043        || (matchNull && (ch == 0))) {
044        return false;
045    }
046    ++mymatch.index;
047    return next(input, mymatch);
048  }
049
050  void dump(StringBuffer os) {
051    os.append('.');
052  }
053}
054